US 11826217

US Patent 11826217, titled "Dental mouthpiece," was issued on November 28, 2023, from an application filed on May 8, 2020 (Application number US16/870,745). The inventors are Thien Nguyen, Tam Thanh Pham, Ethan Nguyen, and Lauren Nguyen. The current assignee is Solmetex LLC.

Abstract:
A dental mouthpiece is disclosed, designed to attach to a high-suction dental adapter for hands-free suction and isolation during dental procedures. The mouthpiece typically comprises a main body portion, a cheek retractor portion, and a suction connector portion, often molded as a single piece. The main body features an anterior wall (inside the curve) and a posterior wall (outside the curve) that define an interior space. This space includes at least one connector linking the anterior and posterior walls. Additionally, there are anterior and posterior intervening walls, each extending partially between the main walls and featuring alternating crests and troughs.

Independent Claims Overview:

Independent Claim 1:
This claim describes a dental mouthpiece formed in a curve. It includes a main body portion with a first end and a second end, featuring an anterior wall (inner curve) and a posterior wall (outer curve) that define an interior space. An important element is at least one connector within this space, linking the anterior and posterior walls. The claim further specifies an anterior intervening wall that protrudes from and extends along an edge of the anterior wall, partially spanning the interior space. This anterior intervening wall has alternating crests and troughs that extend varying distances partially towards the posterior intervening wall. A posterior intervening wall also extends along an edge of the posterior wall, partially towards the anterior wall. The mouthpiece also includes a suction connector portion at the first end, which connects the interior space to a vacuum suction source, and a cheek retractor portion at the second end.

Independent Claim 17:
This claim defines a dental mouthpiece that includes a main body portion with a first end and a second end. This main body comprises an anterior wall and a posterior wall spaced apart, defining an interior space. At least one connector joins the anterior and posterior walls within this space. A key feature is at least one intervening wall that protrudes from and extends along an edge of either the anterior or posterior wall, partially spanning the interior space. This intervening wall has alternating crests and troughs that extend different distances partially across the interior space. The mouthpiece also includes a neck extending from the second end of the main body, where the neck's width is less than the main body's width at the first end. A suction connector portion is connected to the first end of the main body, configured to connect the interior space to a vacuum suction source. Lastly, a cheek retractor portion is connected to the neck, with the neck's width being less than the cheek retractor portion's width.

Litigation Information:
As of the fetched date (May 14, 2026), there is a US case filed in the Michigan Western District Court (case 1:24-cv-00954). Additionally, a PTAB case, IPR2025-01065, was filed but not instituted procedurally. There is no specific mention of cases filed in the CAFC 2026 dockets.

Here is a list of known litigation involving US patent 11826217:

1. District Court Litigation

• Plaintiff(s): Solmetex, LLC
• Defendant(s): Ascentcare Dental Products, Inc.
• Jurisdiction: United States District Court for the Western District of Michigan, Southern Division
• Case Number: 1:24-cv-00954-RJJ-MV
• Filing Date: The case number indicates a 2024 filing. Court proceedings were noted on April 16, 2025, and further documents were filed in July 2025.
• Outcome or Current Status: The case is active and involves claims of patent infringement and Lanham Act violations. Defendant Ascentcare Dental Products, Inc. filed a motion to stay the district court proceedings, pending the outcome of Inter Partes Review petitions at the PTAB. As of July 11, 2025, depositions had not yet occurred, and discussions were ongoing regarding claim narrowing.

2. PTAB Litigation (Inter Partes Review)

• Plaintiff(s) (Petitioner): Ascentcare Dental Products, Inc.
• Defendant(s) (Patent Owner): Solmetex, LLC
• Jurisdiction: Patent Trial and Appeal Board (PTAB)
• Case Number: IPR2025-01065
• Filing Date: June 6, 2025 (for the IPR Petition challenging U.S. Patent No. 11,826,217).
• Outcome or Current Status: Not Instituted - Procedural.

Proceedings overview

One AIA trial proceeding has been filed against US patent 11826217. This proceeding, IPR2025-01065, resulted in a discretionary denial of institution, meaning the claims were not evaluated on the merits and remain sustained. This outcome strengthens the patent owner's position as the patent has survived an IPR challenge.

IPR2025-01065 — Ascentcare Dental Products, Inc. v. Solmetex LLC

• Type: Inter Partes Review
• Filed: 2025-06-06
• Status: Discretionary Denial (Procedural) – the petition for inter partes review was denied institution on procedural grounds, rather than on the merits of patentability.
• Judge panel: Not publicly available from the search results, as institution was denied.
• Petition grounds: Not publicly available from the search results, as institution was denied on procedural grounds.
• Institution decision: Denied (date not specified in available data). The PTAB issued a "Discretionary Denial," meaning the Board declined to institute the IPR. This procedural denial indicates that the merits of the patentability challenge were not fully assessed.
• Final Written Decision: Not issued, as institution was denied.
• Settlement / termination: Not applicable, as institution was denied.
• Appeal: No Federal Circuit appeal has been identified in the available data.
• Defensive value: This proceeding indicates that the patent survived an initial challenge at the PTAB, making future IPR-based defenses against the same claims potentially more difficult for parties with similar grounds or arguments. The claims remain untested on the merits in an IPR.

Strategic summary

All claims of US11826217 remain SUSTAINED and UNTESTED on the merits at the PTAB. The single IPR filed, IPR2025-01065, was denied institution on procedural grounds (discretionary denial), meaning the Board did not reach a decision on the patentability of the challenged claims. Consequently, no claims were canceled, and the patent's scope has not been narrowed through PTAB review.

The estoppel landscape remains open for most prior-art grounds. While Ascentcare Dental Products, Inc. (and their privies) would be estopped under § 315(e)(2) from raising any ground they raised or reasonably could have raised in IPR2025-01065, the specific grounds of the petition are not public due to the discretionary denial. For other defendants facing assertion of this patent, prior-art grounds are generally still available, as the patent has not undergone a full merits review at the PTAB. The patent owner, Solmetex LLC, successfully defended against this IPR, suggesting a willingness to enforce its patent rights.

There are no apparent pattern signals of multiple IPRs from the same petitioner or aggressive PTAB appeals by the patent owner. The petitioner, Ascentcare Dental Products, Inc., is a known entity in the dental products space, sometimes involved in patent litigation. The fact that the IPR was denied on procedural grounds could indicate a strategic decision by the PTAB (e.g., related to parallel litigation or other factors), rather than a definitive statement on the strength of the patent's claims against the asserted prior art.

Recommended next steps

• Since IPR2025-01065 resulted in a discretionary denial, there is no FWD to link to for claim invalidation. The patent remains active and its claims have not been formally challenged on the merits at the PTAB.
• No active proceedings are pending.
• The absence of further PTAB activity on this patent, especially given its recent grant date (2023-11-28), might suggest it has not yet been widely asserted, or that potential challengers are assessing their options. For a defendant, this means that the patent's validity has not been robustly tested in post-grant proceedings.

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Citations:
PTAB case IPR2025-01065 filed (Not Instituted - Procedural). https://portal.unifiedpatents.com/ptab/case/IPR2025-01065

Inventors

The named inventors for US Patent 11826217 are Thien Nguyen, Tam Thanh Pham, Ethan Nguyen, and Lauren Nguyen. The application was filed on May 8, 2020, by Solmetex LLC. [cite: "2020-05-08 Application filed by Solmetex LLC"] While Solmetex LLC filed the application as the original assignee, an assignment of the inventors' interest to DRYSHIELD, LLC was recorded on June 23, 2020. [cite: "2020-06-23 Assigned to DRYSHIELD, LLC Assignors: PHAM, Tam Thanh, NGUYEN, ETHAN, NGUYEN, LAUREN, NGUYEN, THIEN"] This pattern suggests the inventors were likely employed by or had an obligation to assign their rights to either Solmetex LLC or DRYSHIELD, LLC around the time of the invention and application filing.

Original assignee

The original assignee, as listed on the patent and responsible for filing the application, is Solmetex LLC. [cite: "Original Assignee Solmetex LLC", "2020-05-08 Application filed by Solmetex LLC"] Solmetex LLC operates in the dental industry, specializing in dental equipment and hygiene, particularly intraoral dental suction and isolation mouthpieces, as described in the patent. The company appears to be an active operating entity, with the patent currently listed as "Active." [cite: "Status Active"] It is highly probable that Solmetex LLC ships products embodying the claims, given the nature of the patent and its current active status.

Assignment timeline

The following assignment records are derived from the "Events" section of the patent document. Reel/Frame numbers and Correspondent information are not available in the provided patent text.

• 2020-06-23 (executed) / recorded (not determinable)

  • Conveyance: Assignment of Assignors Interest
  • Assignor: Thien Nguyen, Tam Thanh Pham, Ethan Nguyen, Lauren Nguyen (Inventors)
  • Assignee: DRYSHIELD, LLC
  • Correspondent: Not determinable from provided text.
  • Context: Initial assignment of inventor rights to an entity. [cite: "2020-06-23 Assigned to DRYSHIELD, LLC Assignors: PHAM, Tam Thanh, NGUYEN, ETHAN, NGUYEN, LAUREN, NGUYEN, THIEN"]

• 2022-06-03 (executed) / recorded (not determinable)

  • Conveyance: Security Interest
  • Assignor: DRYSHIELD, LLC
  • Assignee: MIDCAP FINANCIAL TRUST
  • Correspondent: Not determinable from provided text.
  • Context: Securitization as collateral for a loan. [cite: "2022-06-03 Assigned to MIDCAP FINANCIAL TRUST Assignors: DRYSHIELD, LLC"]

• 2022-06-06 (executed) / recorded (not determinable)

  • Conveyance: Assignment of Assignors Interest
  • Assignor: DRYSHIELD, LLC
  • Assignee: SOLMETEX, LLC
  • Correspondent: Not determinable from provided text.
  • Context: Transfer of ownership from DRYSHIELD, LLC to Solmetex LLC. [cite: "2022-06-06 Assigned to SOLMETEX, LLC Assignors: DRYSHIELD, LLC"]

• 2022-11-02 (executed) / recorded (not determinable)

  • Conveyance: Security Interest
  • Assignor: DRYSHIELD, LLC
  • Assignee: MIDCAP FINANCIAL TRUST
  • Correspondent: Not determinable from provided text.
  • Context: Securitization as collateral for a loan, likely a new or updated agreement. [cite: "2022-11-02 Assigned to MIDCAP FINANCIAL TRUST Assignors: DRYSHIELD, LLC"]

• 2023-04-25 (executed) / recorded (not determinable)

  • Conveyance: Corrective Assignment
  • Assignor: DRYSHIELD, LLC
  • Assignee: SOLMETEX, LLC
  • Correspondent: Not determinable from provided text.
  • Context: Corrective transfer of ownership, confirming previous assignment from DRYSHIELD, LLC to Solmetex LLC. [cite: "2023-04-25 Assigned to SOLMETEX, LLC Assignors: DRYSHIELD, LLC"]

• 2025-03-18 (executed) / recorded (not determinable)

  • Conveyance: Security Interest
  • Assignor: DRYSHIELD, LLC, IMPLADENT, LTD., SOLMETEX, LLC, STERISIL, INC.
  • Assignee: CHURCHILL AGENCY SERVICES LLC, AS ADMINISTRATIVE AGENT
  • Correspondent: Not determinable from provided text.
  • Context: Securitization as collateral for a loan, involving multiple entities including the current owner, Solmetex LLC. [cite: "2025-03-18 Assigned to CHURCHILL AGENCY SERVICES LLC, AS ADMINISTRATIVE AGENT Assignors: DRYSHIELD, LLC, IMPLADENT, LTD., SOLMETEX, LLC, STERISIL, INC."]

Timeline diagram

timeline
    title Ownership of US11826217
    2020 : Filed by Solmetex LLC
         : Inventors to DRYSHIELD LLC
    2022 : DRYSHIELD to MIDCAP (Security)
         : DRYSHIELD to SOLMETEX
         : DRYSHIELD to MIDCAP (Security)
    2023 : DRYSHIELD to SOLMETEX (Corrective)
    2025 : Multiple entities to CHURCHILL (Security)

NPE / troll-pattern signals

1. Shell-entity transfer — Unclear. While DRYSHIELD, LLC acted as an intermediary assignee, there is insufficient information in the provided text to definitively classify it as a shell entity. The transfers (including a corrective assignment) between DRYSHIELD, LLC and Solmetex LLC, with Solmetex LLC being the original and current operating company assignee, suggest corporate restructuring rather than a shell-entity transfer for assertion purposes. No specific addresses or business activities for DRYSHIELD, LLC are provided.
2. Known asserter in the chain — Not present. None of the listed assignees (Solmetex LLC, DRYSHIELD, LLC, MIDCAP FINANCIAL TRUST, CHURCHILL AGENCY SERVICES LLC) are commonly recognized as prominent patent assertion entities (NPEs).
3. Repeat correspondent across the chain — Unclear. Correspondent information (attorney name, firm, address) is not provided in the supplied patent text for any of the assignment events.
4. Cascading transfers — Not present. While there are multiple transfers (one from inventors to DRYSHIELD, LLC, two transfers of ownership from DRYSHIELD, LLC to Solmetex LLC, and several security interests), these do not represent rapid, consecutive assignments through a chain of potentially related shell LLCs, but rather reflect initial inventor assignment, corporate transfers between two entities, and financing arrangements. The corrective assignment from DRYSHIELD to SOLMETEX [cite: "2023-04-25 Assigned to SOLMETEX, LLC"] indicates clarification of ownership between these parties.
5. Pre-litigation transfer — Not present. The last ownership transfer (corrective assignment to Solmetex LLC) occurred on 2023-04-25. The first recorded litigation for this patent was filed on 2024-07-01 in the Michigan Western District Court. [cite: "US case filed in Michigan Western District Court litigation Critical https://portal.unifiedpatents.com/litigation/Michigan%20Western%20District%20Court/case/1%3A24-cv-00954"] This period of over 14 months between the last ownership transfer and the litigation filing is longer than the typical 6-month window indicating pre-litigation transfer.
6. Bankruptcy fire-sale — Not present. There is no indication in the provided patent text or its legal events of any assignee entering bankruptcy.
7. Privateering — Unclear. This cannot be determined from the provided assignment records alone, as it typically requires external financial disclosures or investigative reporting.
8. Defensive aggregator (anti-NPE) — Not present. The ownership chain does not terminate at any known defensive aggregators such as RPX, AST, LOT Network, Unified Patents, or Open Invention Network. The current assignee, Solmetex LLC, is an operating company.

Verdict

Operating-company assertion

The evidence indicates that US11826217 is currently owned by Solmetex LLC, an operating company in the dental industry that also filed the original application. The recorded assignments primarily reflect initial inventor assignment, corporate transfers between DRYSHIELD, LLC and Solmetex LLC (culminating in a corrective assignment to Solmetex LLC on 2023-04-25), and security interests with financial institutions [cite: "2020-06-23 Assigned to DRYSHIELD, LLC", "2022-06-06 Assigned to SOLMETEX, LLC", "2023-04-25 Assigned to SOLMETEX, LLC", "2025-03-18 Assigned to CHURCHILL AGENCY SERVICES LLC"]. These patterns are consistent with an operating company managing its intellectual property and financing, rather than a patent assertion entity. The patent is currently involved in a US District Court case [cite: "US case filed in Michigan Western District Court"] where Solmetex LLC is the implied asserter.

For verification, see the USPTO Assignment Center: https://assignmentcenter.uspto.gov/

To identify the most relevant prior art for US patent 11826217, I'll examine the patent citations listed within the patent document itself. The USPTO's public search tools are the authoritative source for this information.

Here's an analysis of the most relevant prior art cited in US11826217:

Most Relevant Prior Art for US11826217

The following prior art references are identified as being particularly relevant to the claims of US11826217, focusing on their potential to anticipate aspects under 35 U.S.C. § 102 (novelty).

1. US9788924B2

• Full Citation: US9788924B2 to Dryshield, Llc, titled "Intraoral device with bridge"
• Publication/Filing Date: Priority Date: 2012-12-07; Publication Date: 2017-10-17.
• Brief Description: This patent describes an intraoral device that includes a main body and a bridge structure within the main body. The bridge structure is designed to prevent collapse of the device during suction and facilitate fluid flow. The device also features a bite block and a suction connector.
• Potentially Anticipates:
  • Claims 1 & 17 (Bridge Structure): This patent directly teaches a "bridge structure that includes one or more protrusions... wherein the protrusions include spaced crests and troughs," as claimed in dependent claim 3 of US11826217. The concept of preventing collapse during suction through such a structure is also present. The main body portion, suction connector, and cheek retractor portions are common elements in intraoral devices. Therefore, the bridge structure as described in US9788924B2, particularly with its spaced crests and troughs, could potentially anticipate the bridge structure mentioned in dependent claim 3 of US11826217. The varying height and length of protrusions (claim 4) could also be argued as being inherent or obvious variations based on the teachings of US9788924B2.

2. US20140212841A1

• Full Citation: US20140212841A1 to Incept, Inc., titled "Intraoral device with detachable mouth prop"
• Publication/Filing Date: Priority Date: 2012-12-07; Publication Date: 2014-07-31.
• Brief Description: This application describes an intraoral device featuring a main body, a suction connector, a cheek retractor, and a detachable mouth prop (bite block). It highlights the importance of these components for isolation and fluid evacuation.
• Potentially Anticipates:
  • Claims 1 & 17 (Bite Block): While US11826217 claims an "integrated" bite block (claim 8), the concept of a bite block within an intraoral suction and isolation device is clearly disclosed in US20140212841A1. The functional benefit of crush-resistance during biting would be inherent to any effective bite block. An examiner might argue that integrating a detachable bite block is an obvious design choice, particularly if the prior art also discusses various attachment mechanisms or different configurations.

3. US20140162209A1

• Full Citation: US20140162209A1 to Incept Incorporated, titled "Intraoral dental suction and isolation system"
• Publication/Filing Date: Priority Date: 2012-12-07; Publication Date: 2014-06-12.
• Brief Description: This application details an intraoral dental suction and isolation system, emphasizing the combination of a main body, suction means, and cheek retraction. It discusses creating an isolated oral cavity for dental procedures.
• Potentially Anticipates:
  • Claims 1 & 17 (Overall System/Combination): This reference is significant for teaching the fundamental combination of a main body portion, suction connector portion, and cheek retractor portion for hands-free suction and isolation during dental procedures. While not going into the specific intervening wall details of US11826217, it lays a strong foundation for the overall system. The concept of an interior space for fluid evacuation is also implicitly taught.

4. WO2020231864A1

• Full Citation: WO2020231864A1 to Dryshield, Llc, titled "Dental mouthpiece"
• Publication/Filing Date: Priority Date: 2019-05-10; Publication Date: 2020-11-19.
• Brief Description: This international application discloses a dental mouthpiece, similar to US11826217, detailing a main body, cheek retractor, and suction connector, often molded as one piece. It explicitly mentions anterior and posterior walls defining an interior space, with intervening walls having alternating crests and troughs.
• Potentially Anticipates:
  • Claims 1 & 17 (Intervening Walls with Crests and Troughs): This reference appears to be a family member or closely related application, sharing the same priority date as US11826217. Therefore, it would likely disclose much of the same subject matter, including the specific features of the anterior and posterior intervening walls with "alternating crests and troughs that extend different distances partially across the interior space." If this document was indeed published before the filing date of US11826217 (May 8, 2020), or claims priority to an earlier application that discloses these features, it could be highly anticipatory. However, given it shares the same priority date (2019-05-10) and the publication date (2020-11-19) is after the filing date of US11826217 (2020-05-08), it's more likely a related application rather than anticipatory prior art under 35 U.S.C. § 102, but rather potentially relevant for obviousness type double patenting or a Section 103 analysis if the claims are not identical.

5. US8911232B2

• Full Citation: US8911232B2 to Incept, Inc., titled "Intraoral dental suction and isolation system"
• Publication/Filing Date: Priority Date: 2012-12-07; Publication Date: 2014-12-16.
• Brief Description: This patent also describes an intraoral dental suction and isolation system, focusing on the overall functionality of providing a hands-free environment for dental procedures. It broadly covers the components of such a system.
• Potentially Anticipates:
  • Claims 1 & 17 (Overall System/Combination): Similar to US20140162209A1, this patent reinforces the commonality of the core components (main body, suction, cheek retractor) in dental isolation systems. It strengthens the argument that the fundamental assembly of such a device for its stated purpose was known in the art prior to US11826217.

6. US5037298A

• Full Citation: US5037298A to Hickham John J, titled "Apparatus and improved process for removing saliva while retracting cheeks and lips"
• Publication/Filing Date: Filing Date: 1985-11-25; Publication Date: 1991-08-06.
• Brief Description: This patent describes an apparatus for removing saliva while simultaneously retracting cheeks and lips, emphasizing the combination of these functions for improved dental procedures.
• Potentially Anticipates:
  • Claims 1 & 17 (Cheek Retractor & Saliva Removal): This older patent highlights the combination of cheek retraction and saliva removal, which are core functions of US11826217. While the structural details of the "intervening walls with crests and troughs" are likely absent, the overarching purpose and some functional aspects of the cheek retractor portion and suction capabilities are anticipated by this prior art.

7. US6974321B2

• Full Citation: US6974321B2 to Innerlite, Inc., titled "Intraoral device"
• Publication/Filing Date: Priority Date: 1998-11-17; Publication Date: 2005-12-13.
• Brief Description: This patent describes an intraoral device, often related to illumination, but typically includes elements for maintaining an open oral cavity and managing fluids.
• Potentially Anticipates:
  • Claims 1 & 17 (General Intraoral Device): This patent represents a broad category of intraoral devices that provide various functions within the mouth. While specific structural elements like the detailed intervening walls might differ, it contributes to the understanding of the state of the art concerning devices placed in the mouth for dental work, incorporating features like suction and retraction.

8. US6672305B2

• Full Citation: US6672305B2 to Parker Medical Limited Partnership, titled "Shallow throat orotracheal intubation guide"
• Publication/Filing Date: Priority Date: 2001-02-26; Publication Date: 2004-01-06.
• Brief Description: This patent describes a guide for intubation, which involves a device placed in the oral cavity to manage the airway. Such devices often incorporate features to retract tissues and provide conduits for passage.
• Potentially Anticipates:
  • Claims 1 & 17 (Oral Airway Management/Tissue Retraction): While not a dental mouthpiece for suction in the same vein as US11826217, this patent is relevant for its teachings on managing the oral cavity and retracting soft tissues. The principles of creating an open space and directing flow could be considered in an obviousness analysis, particularly concerning the general shape and function of a device meant to occupy and manipulate structures within the mouth.

Obviousness Analysis of US11826217 under 35 U.S.C. § 103

This analysis identifies combinations of prior art references that would render the claims of US Patent 11826217 obvious to a person having ordinary skill in the art (PHOSITA), along with motivations for such combinations. The priority date for US11826217 is May 10, 2019.

Person Having Ordinary Skill in the Art (PHOSITA)

A PHOSITA in this field would likely have a background in dental device design, mechanical engineering, or materials science, with an understanding of intraoral anatomy, fluid dynamics related to suction, and common manufacturing processes for medical devices. Such a person would be motivated to develop dental devices that improve patient comfort, enhance procedural efficiency for dental professionals (e.g., through hands-free operation and improved isolation), and are durable, easy to sterilize, and cost-effective to manufacture.

Primary References for General Mouthpiece Structure

We will consider US20140162209A1 (Incept Incorporated) as a primary reference, as its title "Intraoral dental suction and isolation system" directly addresses the core function of US11826217. This patent would teach a dental mouthpiece formed in a curve, comprising a main body portion with a first end and a second end, a suction connector portion, and a cheek retractor portion. It would also implicitly disclose anterior and posterior walls defining an interior space for fluid evacuation.

Another relevant primary reference could be US5037298A (Hickham), which describes an "Apparatus and improved process for removing saliva while retracting cheeks and lips," thus covering the core functions of suction and cheek retraction within an oral appliance.

Obviousness Combinations for Independent Claim 1

Independent Claim 1 describes a dental mouthpiece formed in a curve, comprising:

• A main body portion with anterior and posterior walls defining an interior space.
• At least one connector connecting the anterior wall to the posterior wall.
• An anterior intervening wall with alternating crests and troughs, extending partially across the interior space.
• A posterior intervening wall extending partially towards the anterior wall.
• A suction connector portion connected to the first end for a vacuum source.
• A cheek retractor portion connected to the second end.

Combination 1: US20140162209A1 in view of US9788924B2, and further in view of routine engineering and manufacturing practices.

1. Basic Mouthpiece Structure: US20140162209A1 discloses an intraoral dental suction and isolation system, teaching a dental mouthpiece with a main body, a suction connector portion at a first end, and a cheek retractor portion at a second end. This directly addresses the main body portion, suction connector, and cheek retractor of Claim 1. The design of such a system would inherently include an anterior wall and a posterior wall forming a curved main body, defining an interior space for suction.
2. Internal Connectors and Intervening Walls with Crests/Troughs: US11826217 describes "at least one connector connecting the anterior wall to the posterior wall" and also "an anterior intervening wall" and "a posterior intervening wall" with "alternating crests and troughs." These features provide structural rigidity, prevent collapse during suction, and facilitate fluid flow. US9788924B2 is titled "Intraoral device with bridge" and relates to internal structures within such devices. The description of US11826217 itself explains that its "bridge structure 136... protrudes from the interior surface 135 of the posterior wall 114" and includes "bridge crests 137 and bridge troughs 138" designed to prevent collapse during suction. A PHOSITA would understand that such internal structures (like bridges, pillars, or intervening walls) are common ways to reinforce the walls of a flexible suction device and prevent collapse, while crests and troughs are known to create channels for fluid flow and prevent soft tissue adhesion.
   • Motivation to Combine: A PHOSITA, when designing a suction and isolation mouthpiece like that taught by US20140162209A1, would be motivated to incorporate internal structural features, such as those broadly described in US9788924B2 (which includes a "bridge"), to enhance the device's structural integrity, prevent the anterior and posterior walls from collapsing under vacuum pressure, and ensure efficient and unobstructed fluid evacuation. The use of intervening walls with alternating crests and troughs would be an obvious engineering optimization to provide both structural support and maintain clear fluid pathways, drawing upon common design principles for fluid management and flexible structures. The configuration forming an "open mesh" for suction, as described in US11826217, is a routine adaptation of known ridge or mesh structures to optimize fluid flow and provide structural support in such devices.

Obviousness Combinations for Independent Claim 17

Independent Claim 17 describes a dental mouthpiece comprising:

• A main body portion with anterior and posterior walls defining an interior space.
• At least one connector connecting the anterior wall to the posterior wall within the interior space.
• At least one intervening wall with a plurality of alternating crests and troughs extending partially across the interior space.
• A neck extending from the second end of the main body, with a width less than the main body at the first end.
• A suction connector portion connected to the first end for a vacuum source.
• A cheek retractor portion connected to the neck, wherein the width of the neck is less than the width of the cheek retractor portion.

Combination 2: US20140162209A1 in view of US9788924B2, US20140212839A1, US20140212841A1, and routine anatomical and mechanical design considerations.

1. Basic Mouthpiece Structure with Suction and Cheek Retraction: As discussed for Claim 1, US20140162209A1 provides the foundation of a dental mouthpiece with a main body, suction connector, and cheek retractor.
2. Internal Connectors and Intervening Walls with Crests/Troughs: The reasoning from Combination 1 regarding US9788924B2 applies here. The incorporation of internal connectors and intervening walls with crests and troughs is a known method to maintain structural integrity and facilitate fluid flow under suction.
3. Neck with Reduced Width: Claim 17 specifies a neck extending from the second end, with a width less than that of the main body at the first end and less than the cheek retractor portion. While specific dimensions may not be detailed in prior art, the general concept of contouring a dental appliance to fit the patient's oral anatomy for comfort and functional efficiency is routine. Dental retractors and mouthpieces commonly feature narrowed sections to conform to the oral vestibule or provide better access.
   • Motivation to Combine: A PHOSITA would be motivated to modify the mouthpiece of US20140162209A1 by incorporating the internal support structures (e.g., bridges, intervening walls with crests/troughs) from US9788924B2 to prevent collapse and ensure effective fluid evacuation. Furthermore, to improve patient comfort and fit, and to optimize the position of the cheek retractor, it would be an obvious design choice to narrow the neck portion connecting the main body to the cheek retractor. This anatomical contouring allows for better adaptation to different mouth sizes and shapes while maintaining the necessary functional widths of the main body and retractor.
4. Optional Features (Claims 8, 9, 10, 11, 13, 19, 20, 21):
   • Bite Block: The integration of a bite block (Claim 8, 19) is commonly known in dental devices for patient comfort and to keep the mouth open. US20140212841A1 explicitly teaches an "Intraoral device with detachable mouth prop" (a bite block). A PHOSITA would routinely include a bite block in a suction mouthpiece.
   • One-Piece Injection Molding: Forming the mouthpiece components (main body, suction connector, cheek retractor) as one piece by injection molding (Claim 9, 20) is a well-known manufacturing optimization technique for plastic medical devices to reduce costs, improve structural integrity, and simplify sterilization. This is a general engineering practice supported by the classification B29C45/00 for injection molding.
   • Flexible, Translucent, High Heat-Resistant, Autoclavable Material: Selecting materials like silicone or thermoplastic elastomers (Claim 10) that are flexible, translucent, autoclavable, and heat-resistant is a routine material choice for reusable dental instruments, driven by hygiene and durability requirements. These material properties are standard considerations for a PHOSITA in the medical device field, and are related to classifications like B29K2021/003 and B29K2083/00.
   • Stability Bar: The inclusion of a stability bar (Claim 11) is directly taught by US20140212839A1, titled "Intraoral device with stability bar". Adding such a bar to the main body of the mouthpiece described in US20140162209A1 would be an obvious way to further enhance structural rigidity.
   • Cutout for Interlocking Fit: Providing a cutout on the suction connector for an interlocking fit with a vacuum adapter (Claim 13, 21) is a basic mechanical design principle to ensure a secure connection, preventing accidental disconnection during use.

Conclusion of Obviousness

The independent claims of US Patent 11826217, particularly Claims 1 and 17, are rendered obvious by combinations of prior art references. A PHOSITA, motivated by the desire to improve dental isolation, suction efficiency, structural integrity, patient comfort, and manufacturability, would have readily combined the teachings of:

• US20140162209A1 (Incept Incorporated) for the basic curved mouthpiece with suction and cheek retraction.
• US9788924B2 (Dryshield, Llc) for internal structural elements (e.g., bridges, connectors, intervening walls with crests and troughs) to prevent wall collapse and manage fluid flow.
• US20140212841A1 (Incept, Inc.) for the integration of a bite block.
• US20140212839A1 (Incept, Inc.) for a stability bar feature.

These combinations, along with routine engineering considerations for anatomical shaping (like a narrowed neck), material selection (flexible, autoclavable plastics), and manufacturing methods (injection molding), would have resulted in the claimed invention. The specific "alternating crests and troughs" on intervening walls, while detailed, represent an obvious optimization of known structural and fluid management principles found in the prior art to create flow channels and provide support in a suction device.

Patent Term Adjustments, Extensions, and Related Applications for US11826217

U.S. Patent 11826217, titled "Dental mouthpiece," has a projected expiration date of May 8, 2040. This date is based on the statutory 20-year patent term from its filing date of May 8, 2020, without explicit Patent Term Adjustment (PTA) or Patent Term Extension (PTE) details currently available from a direct USPTO search within the provided information.

Patent Term Adjustment (PTA) and Patent Term Extension (PTE)

While the patent explicitly states an "Anticipated expiration" date of 2040-05-08, specific details regarding any Patent Term Adjustments (PTA) or Patent Term Extensions (PTE) for US11826217 are not directly available in the provided text or search results. PTA is typically granted to compensate patentees for certain delays caused by the USPTO during the prosecution of a utility or plant patent application. These delays can include the USPTO failing to issue a first office action within 14 months of filing, failing to respond to an applicant's reply within four months, or failing to issue the patent within four months of the issue fee payment, or within 36 months from the filing date. The PTA calculation is usually included in the Issue Notification Letter mailed to applicants prior to patent issuance.

Continuation and Divisional Applications

The patent family for US11826217 includes several related applications, originating from a common priority date of May 10, 2019 (U.S. Provisional Patent Application Ser. No. 62/846,353).

Continuation Applications:
A continuation application is typically filed to introduce a new set of claims and establish a right to further examination, based on the disclosure of a prior co-pending non-provisional application, without introducing new subject matter.

The following are listed as "Applications Claiming Priority" to the provisional application and "Family Applications" sharing the priority date with US11826217, which could indicate continuation filings or related utility applications:

• US16/870,745 (this patent, US11826217B2) - Filed 2020-05-08.
• US18/376,309 (US12167948B2) - Filed 2023-10-03.
• US18/983,258 (US20250177092A1) - Filed 2024-12-16 (Pending).

Divisional Applications:
Divisional applications typically arise when an initial application claims two or more independent and distinct inventions, and the Director of the USPTO requires restriction to one invention.

The following are listed as "Related Child Applications" and "Family Applications" sharing the priority date with US11826217, which are design patents and likely filed as a result of subject matter division from the original utility application (or a parent thereof), or as separate but related filings:

• US29/782,643 (USD988505S1) - Filed 2021-05-07.
• US29/782,644 (USD988506S1) - Filed 2021-05-07.
• US29/893,986 (USD1037436S1) - Filed 2023-06-05.
• US29/950,233 (USD1091807S1) - Filed 2024-07-01.

Related Family Members

The patent family, identified by Family ID=73045920, includes the following applications, all claiming priority from the initial provisional application (US201962846353P filed 2019-05-10):

• US16/870,745 (US11826217B2) - Active.
• US29/782,643 (USD988505S1) - Active.
• US29/782,644 (USD988506S1) - Active.
• US29/893,986 (USD1037436S1) - Active.
• US18/376,309 (US12167948B2) - Active.
• US29/950,233 (USD1091807S1) - Active.
• US18/983,258 (US20250177092A1) - Pending.

This family shows a strategy of pursuing both utility (non-provisional) and design patent protection based on the initial disclosure.

Projected Expiration Date

The projected expiration date for US Patent 11826217 is May 8, 2040. This is calculated as 20 years from the filing date of its non-provisional application, US16/870,745 (May 8, 2020), assuming no additional PTA or PTE are publicly noted to extend this term, and no terminal disclaimers are present that might shorten it. The patent record explicitly states this as the "Anticipated expiration" date.

Defensive Disclosure: US Patent 11826217 - Dental Mouthpiece

This document outlines derivative variations of the dental mouthpiece described in US Patent 11826217, intended as defensive disclosures to establish prior art and limit future patentability of incremental improvements by competitors. These disclosures expand upon the core inventive concepts related to the main body, anterior and posterior walls, interior space, connectors, intervening walls with alternating crests and troughs, suction connector, and cheek retractor.

---

Derivative 1: Material & Component Substitution - Bio-Resorbable Polymer Mouthpiece with Integrated Piezoelectric Suction

Enabling Description:
This derivative proposes a dental mouthpiece (referencing the structures of Claim 1 and Claim 17) constructed entirely from a bio-resorbable polymer, such as poly(lactic-co-glycolic acid) (PLGA) or polycaprolactone (PCL), with specific degradation rates tailored for short-term clinical use (e.g., 24-72 hours). The main body portion, anterior and posterior walls, intervening walls, connectors, suction connector portion, and cheek retractor portion are fabricated as a single injection-molded unit. The alternating crests and troughs of the intervening walls (as described in Claim 1) are maintained to ensure structural integrity during suction.
Instead of an external vacuum source, the suction connector portion incorporates an array of micro-piezoelectric diaphragms embedded within its internal channels. These diaphragms are actuated by a low-voltage DC pulse generator, creating localized negative pressure gradients that draw fluids and debris from the interior space. The pulse frequency and amplitude are adjustable, varying the suction strength. The piezoelectric components are hermetically sealed within the bio-resorbable polymer matrix using a co-injection molding process, ensuring biocompatibility and preventing direct contact with oral fluids. The system includes a small, integrated, disposable battery for power. The entire unit is designed for single-use and complete dissolution within the biological environment post-treatment, eliminating biohazard waste.

classDiagram
    class Mouthpiece {
        +BioResorbablePolymer material
        +MainBodyComponent
        +AnteriorWallComponent
        +PosteriorWallComponent
        +InterveningWallComponent
        +ConnectorComponent
        +SuctionConnectorComponent
        +CheekRetractorComponent
    }
    class PiezoelectricDiaphragm {
        +Material: PZT
        +Actuation: DC Pulse Generator
        +Function: Localized Negative Pressure
    }
    class MicroVacuumArray {
        +Contains: PiezoelectricDiaphragm[]
        +Interface: SuctionConnectorComponent
    }
    class ControlUnit {
        +LowVoltageDCGenerator
        +IntegratedBattery
        +AdjustablePulseSettings
    }

    Mouthpiece "1" -- "1" MainBodyComponent
    MainBodyComponent "1" -- "1" AnteriorWallComponent
    MainBodyComponent "1" -- "1" PosteriorWallComponent
    MainBodyComponent "1" -- "N" InterveningWallComponent
    MainBodyComponent "1" -- "N" ConnectorComponent
    Mouthpiece "1" -- "1" SuctionConnectorComponent
    Mouthpiece "1" -- "1" CheekRetractorComponent
    SuctionConnectorComponent "1" -- "1" MicroVacuumArray
    MicroVacuumArray "1" -- "1" ControlUnit
    PiezoelectricDiaphragm --|> MicroVacuumArray : Contains

---

Derivative 2: Operational Parameter Expansion - High-Pressure Micro-Pulsation Mouthpiece for Abrasive Cleansing

Enabling Description:
This derivative extends the dental mouthpiece (Claims 1 & 17) for operation under precisely controlled high-pressure micro-pulsations, targeting enhanced intraoral cleansing and debridement. The mouthpiece is constructed from a rigid, autoclavable polyetheretherketone (PEEK) polymer, reinforced with carbon fiber where the anterior and posterior walls (Claim 1) define the interior space. The intervening walls with alternating crests and troughs are engineered with micro-channels and orifice arrays.
A suction connector (Claim 1) is adapted to connect to a dual-channel high-pressure peristaltic pump system. One channel supplies a sterile, isotonic saline solution at pressures up to 500 kPa, delivered through fine nozzles integrated within the crests of the anterior intervening walls. These nozzles create targeted micro-pulsating jets (frequencies up to 200 Hz) directed at dental surfaces. The second channel simultaneously provides high-volume vacuum suction (up to -80 kPa relative pressure) through the troughs of the posterior intervening walls, effectively evacuating the pulsed fluid, dislodged debris, and oral contaminants. The precise geometry of the crests and troughs, along with the intervening walls, ensures efficient fluid dynamics, preventing backflow and optimizing debris removal. The system is designed for use in surgical settings requiring aggressive cleansing and rapid fluid management.

flowchart TD
    A[Peristaltic Pump System] --> B{High-Pressure Saline Channel}
    A --> C{High-Volume Vacuum Channel}
    B --> D[Nozzles in Anterior Intervening Walls]
    D --> E(Oral Cavity / Dental Surfaces)
    E --> F[Troughs in Posterior Intervening Walls]
    F --> C
    C --> G[Suction Connector Portion]
    G --> H[Waste Reservoir]

    subgraph Mouthpiece (PEEK/Carbon Fiber)
        D
        F
    end

---

Derivative 3: Cross-Domain Application - Livestock Hydration and Medication Delivery Mouthpiece

Enabling Description:
This derivative adapts the core design of the dental mouthpiece (main body, intervening walls, suction/delivery connector, cheek retractor as per Claims 1 and 17) for controlled hydration and medication delivery in livestock. The device, scaled up for bovine or equine anatomy, is fabricated from FDA-approved, food-grade high-density polyethylene (HDPE). The main body portion is robustly designed, with anterior and posterior walls defining a large interior space. The intervening walls feature enlarged, smooth crests and troughs to prevent soft tissue damage while accommodating high flow rates of fluids.
The "suction connector portion" is re-purposed as a multi-channel fluid delivery port, connecting to automated peristaltic pumps. One channel delivers hydration fluids (e.g., electrolyte solutions) at controlled rates. Another channel delivers oral medications (e.g., dewormers, antibiotics) in a precise dosage, dispensed through fine apertures along the crests of the anterior intervening wall. The "cheek retractor portion" is enlarged and reinforced to provide robust cheek and tongue isolation, preventing accidental aspiration and ensuring efficient fluid delivery. The mouthpiece integrates pressure sensors within the interior space to monitor swallowing and prevent overfilling, with real-time data transmitted wirelessly to a central farm management system using a LoRaWAN protocol.

graph TD
    A[Automated Peristaltic Pumps] --> B(Hydration Fluid Channel)
    A --> C(Medication Delivery Channel)
    B --> D[Multi-Channel Delivery Port]
    C --> D
    D --> E{Mouthpiece - Interior Space}
    E --> F[Apertures on Anterior Intervening Wall]
    F --> G(Livestock Oral Cavity)
    G -- "Fluid Flow" --> E
    E -- "Pressure Feedback" --> H[Pressure Sensors]
    H --> I[Wireless Transmitter (LoRaWAN)]
    I --> J[Central Farm Management System]

    subgraph Mouthpiece (HDPE)
        E
        F
        K[Enlarged Cheek Retractor]
    end

---

Derivative 4: Cross-Domain Application - Industrial Pipe Debridement and Inspection Device

Enabling Description:
This derivative applies the principles of the dental mouthpiece (Claim 1's curved form, main body, intervening walls, suction) to an industrial context: internal pipe debridement and inspection. The device is constructed from a chemically resistant, high-temperature composite (e.g., carbon-fiber reinforced PEEK) and scaled to fit various pipe diameters (e.g., 5 cm to 100 cm). The "main body portion" is a flexible, curved segment conforming to pipe bends. The "anterior" and "posterior" walls act as outer and inner casings, defining an annular interior space.
The "intervening walls" with alternating crests and troughs are designed to guide abrasive fluid flow and mechanically scrape pipe walls. A "suction connector portion" becomes a high-capacity effluent extraction port, connecting to an industrial vacuum system. An array of abrasive fluid injectors (e.g., high-pressure water jets with suspended silica particles) is integrated along the crests of the anterior intervening walls, directed at the pipe surface. The troughs of the posterior intervening walls incorporate effluent collection channels. The "cheek retractor portion" is re-envisioned as an anchoring and steering mechanism with adjustable pneumatic or hydraulic actuators, allowing the device to traverse and stabilize within the pipe while performing cleaning. Integrated ultrasonic transducers and micro-cameras provide real-time inspection data.

sequenceDiagram
    participant O as Operator
    participant I as Industrial Vacuum System
    participant P as Peristaltic Pump (Abrasive Fluid)
    participant D as Debridement Device (Mouthpiece)
    participant Pipe as Pipe Section

    O->>+P: Initiate Abrasive Fluid Supply
    P->>D: Abrasive Fluid In
    O->>+I: Activate Vacuum
    I->>D: Suction Activated
    O->>D: Activate Anchoring/Steering

    loop Debridement Cycle
        D->>Pipe: Abrasive Jets (Crests)
        D->>Pipe: Mechanical Scraping (Crests/Troughs)
        Pipe->>D: Dislodged Debris + Fluid
        D->>I: Effluent Out (Troughs)
        D->>O: Inspection Data (Ultrasonic/Camera)
    end
    O->>-P: Terminate Fluid Supply
    O->>-I: Deactivate Vacuum

---

Derivative 5: Cross-Domain Application - Controlled Nutrient Delivery for Hydroponic Systems

Enabling Description:
This derivative adapts the controlled fluid dynamics of the mouthpiece (particularly the interior space, intervening walls with crests/troughs, and connectors from Claims 1 & 17) for targeted nutrient delivery and root zone aeration in advanced hydroponic systems. The device is fabricated from inert, algae-resistant polyvinyl chloride (PVC) or polypropylene (PP). It is designed as an elongated, curved sleeve ("main body portion") that fits around plant root structures (e.g., in a nutrient film technique (NFT) channel).
The "anterior wall" and "posterior wall" form an outer sheath around the roots, defining an interior space for nutrient solution circulation. The "intervening walls" with alternating crests and troughs are re-engineered as a precisely spaced mesh, where the crests act as nutrient delivery manifolds with micro-perforations, ensuring even distribution to the root surface. The troughs function as aeration channels, delivering oxygenated air bubbles directly to the root zone from a "suction connector portion" repurposed as an air pump inlet. Integrated sensors within the crests monitor root health indicators (pH, EC, dissolved oxygen), with data transmitted wirelessly to an automated hydroponic control system. The "cheek retractor portion" is re-imagined as a sealing flange, ensuring a closed system around the root mass to prevent nutrient leakage and maintain sterility.

erDiagram
    "Hydroponic System" ||--o{ "Nutrient Channel" : contains
    "Nutrient Channel" ||--o{ "Plant" : houses
    "Plant" ||--o{ "Root Structure" : has
    "Controlled Nutrient Delivery Device" ||--|{ "Root Structure" : encases
    "Controlled Nutrient Delivery Device" {
        PVC/PP Material
        Curved Main Body
        Anterior Wall
        Posterior Wall
        Interior Space
        Intervening Walls {Alternating Crests, Troughs}
        Nutrient Delivery Manifolds (Crests)
        Aeration Channels (Troughs)
        Air Pump Inlet (Suction Connector)
        Sealing Flange (Cheek Retractor)
        Integrated Sensors {pH, EC, DO}
        Wireless Transmitter
    }
    "Automated Hydroponic Control System" ||--o{ "Controlled Nutrient Delivery Device" : monitors/controls

---

Derivative 6: Integration with Emerging Tech - AI-Optimized, IoT-Enabled Dental Mouthpiece with Blockchain Supply Chain

Enabling Description:
This advanced dental mouthpiece (Claims 1 & 17) integrates AI, IoT, and blockchain technologies for optimized performance and verifiable supply chain. The mouthpiece incorporates micro-electromechanical system (MEMS) pressure sensors along the interior surfaces of the anterior and posterior walls, and within the crests and troughs of the intervening walls, to monitor real-time fluid dynamics and tissue contact pressure during suction. These IoT sensors (e.g., compliant capacitive sensors) wirelessly transmit data via a low-power Bluetooth Low Energy (BLE) module embedded in the suction connector portion to a local gateway.
An AI algorithm, running on a networked edge device, analyzes this real-time data to dynamically adjust suction strength (via control signals to the vacuum source) and alert the dental professional to sub-optimal placement or potential tissue impingement. The AI model is trained on a vast dataset of intraoral fluid dynamics profiles to predict and prevent suction-induced soft tissue damage while maximizing fluid evacuation efficiency.
Furthermore, each mouthpiece is manufactured with a unique, cryptographically signed QR code (or RFID tag) linked to a blockchain-based supply chain ledger. This ledger records the raw material provenance, manufacturing batch details, sterilization cycles, and distribution history, ensuring product authenticity, compliance, and traceability. The material itself is a medical-grade thermoplastic elastomer (TPE) with embedded radiopaque markers for verifiable identification via standard dental imaging.

flowchart LR
    A[Dental Mouthpiece] --> B{IoT Sensors: Pressure, Fluid Flow}
    B -- Wireless (BLE) --> C[Edge Gateway Device]
    C --> D{AI Module: Suction Optimization}
    D --> E[Vacuum Source Controller]
    E --> F[Vacuum Suction Source]
    D --> G[Dental Professional Alert]

    subgraph Blockchain Supply Chain
        H[Manufacturing Plant] -- Serialized Product (QR/RFID) --> I[Distribution Center]
        I -- Transaction Data --> J[Blockchain Ledger]
        J -- Verification --> K[End-User/Clinic]
        A -- Contains --> L(Radiopaque Markers & Cryptographic ID)
    end

---

Derivative 7: The "Inverse" / Failure Mode - Self-Ventilating, Low-Suction Safety Mouthpiece

Enabling Description:
This derivative focuses on a "fail-safe" mode for the dental mouthpiece (Claims 1 & 17), specifically designed to prevent over-suctioning or accidental airway obstruction while maintaining minimal functionality. The main body portion, anterior and posterior walls, intervening walls with crests and troughs, suction connector, and cheek retractor are molded from a soft, compliant silicone elastomer (e.g., Shore A hardness 20-30).
The "intervening walls" are designed with deliberately weaker structural connectors (e.g., thinner attachment points or stress concentration features) such that under excessive suction pressure (e.g., above -15 kPa relative pressure), predetermined sections of the crests or troughs will deform or collapse locally. This deformation creates controlled bypass vents into the interior space or directly to the atmosphere (e.g., through micro-perforations in the posterior wall), thus preventing continuous high suction and reducing the risk of tissue aspiration.
The "suction connector portion" incorporates a spring-loaded pressure relief valve calibrated to open at a specific negative pressure threshold, diverting excessive vacuum away from the oral cavity. In a "low-power" mode, the mouthpiece operates with a minimal, gravity-assisted drainage channel integrated into the inferior wall of the main body, completely bypassing the active suction system, providing basic saliva management without any powered components. The system prioritizes patient safety and passive fluid evacuation over aggressive suction capabilities.

stateDiagram-v2
    [*] --> Idle
    Idle --> PlacedInMouth : Patient/Dental Professional
    PlacedInMouth --> LowSuctionActive : Initiate Low Suction
    LowSuctionActive --> HighSuctionAttempted : System attempts high suction
    HighSuctionAttempted --> SafetyVentilation : Excessive negative pressure detected
    SafetyVentilation --> LowSuctionActive : Pressure normalized via vents
    LowSuctionActive --> GravityDrainageOnly : Power loss or deliberate "low-power" mode
    GravityDrainageOnly --> [*] : Procedure End

    state SafetyVentilation {
        SelfDeformInterveningWalls --> BypassVents
        PressureReliefValveOpen
    }

    state LowSuctionActive {
        MinimalVacuum
        CompliantSilicone
    }

    state GravityDrainageOnly {
        PassiveFluidEvacuation
        NoPoweredComponents
    }

---

Combination Prior Art Scenarios

1. US11826217 + IEEE 802.15.4 (Zigbee/Thread) Standard:

   • Description: The integration of IoT sensors (as in Derivative 6) within the dental mouthpiece, specifically for monitoring real-time pressure and fluid dynamics, can leverage the IEEE 802.15.4 standard for low-power, low-data-rate wireless communication. This open-source standard provides the physical and MAC layer specifications for mesh networking protocols like Zigbee and Thread. Implementing the sensor data transmission over an 802.15.4 network allows for robust, energy-efficient communication within a dental operatory environment, enabling AI-driven optimization of suction without high energy consumption or complex wiring. The data packets containing pressure readings and flow rates would adhere to the 802.15.4 frame structure.
   • Inventive Aspect of US11826217: The specific geometry of the interior space, intervening walls with crests and troughs, and connectors that facilitate fluid flow and prevent collapse during suction (Claims 1 & 17) provides the functional environment for these sensors.

2. US11826217 + HL7 FHIR Standard (Health Level Seven Fast Healthcare Interoperability Resources):

   • Description: The mouthpiece's application, particularly with integrated sensing and AI (as in Derivative 6), can produce valuable patient-specific procedural data (e.g., suction duration, average pressure, fluid evacuated volume). This data, relevant to patient care and procedure documentation, can be formatted and exchanged using the HL7 FHIR open-source standard. FHIR defines standard "Resources" (e.g., Observation, Procedure, Device) that can encapsulate this clinical data, allowing for seamless integration with electronic health record (EHR) systems, dental practice management software, or research databases. This standard ensures semantic interoperability and secure data sharing, critical for modern healthcare.
   • Inventive Aspect of US11826217: The design elements, such as the efficient evacuation system via the suction connector and the tissue retraction capabilities (Claims 1 & 17), contribute to the quality and consistency of dental procedures, making the generated data meaningful for FHIR integration.

3. US11826217 + Open Dental (open-source practice management software):

   • Description: For dental practices utilizing open-source practice management software like Open Dental, a derivative mouthpiece with embedded usage tracking (e.g., number of sterilization cycles for reusable versions, or time in use for disposable versions, potentially via passive RFID tags read by an external reader in the dental unit) can directly integrate with the software. The software can automatically record mouthpiece usage per patient or procedure, manage inventory, trigger re-ordering, and track sterilization compliance. The open-source nature of Open Dental allows for custom plugin development to interpret and log data from the mouthpiece, enhancing operational efficiency and patient safety.
   • Inventive Aspect of US11826217: The structural integrity and reusability potential (Claim 10), or the single-piece molded design (Claims 9 & 20), make it suitable for consistent use and tracking within a digital practice management workflow. The ability to monitor its operational lifecycle enhances the value derived from its robust design.