US 11699808

Here is a concise summary of US patent 11699808:

• Title: Battery
• Assignee: Ningde Amperex Technology Ltd
• Inventors: Bolin Zhou
• Filing Date: 2021-07-13
• Issue Date: 2023-07-11
• Abstract: A battery including a battery body and a flange portion. The battery body comprises a first side face protruding from a surface of the battery body. The flange portion is arranged outside the battery body and includes a protrusion segment connected to the battery body, with the protrusion segment protruding away from the battery body.

Plain-Language Overview of Independent Claim:

• Claim 1: This claim describes a battery comprising an electrode body and a package. The package has a first part that covers a second plane of the electrode body. A second part of the package protrudes from the first part in the width direction of the electrode body and includes a curved structure. This curved structure specifically curves around a curved side face of the electrode body in the thickness direction. The second part has a first end connected to the first part and a second end opposite the first end in the thickness direction. Crucially, this second part is adhered to the curved side face of the electrode body via an adhesive layer.

Regarding CAFC 2026 dockets for patent US11699808, I do not have authoritative information from the conducted searches. The search results provided general information about accessing CAFC case information and USPTO litigation data, but no specific dockets for US11699808 for the year 2026 were found.

As of April 26, 2026, I do not have specific information about known litigation involving US patent 11699808, including plaintiff(s), defendant(s), jurisdiction, case number, filing date, and outcome or current status. While I can access general information about using PACER and the CAFC website to find case records, the search results did not yield any direct litigation records for patent US11699808.

To find this information, one would typically need to conduct a search on PACER (Public Access to Court Electronic Records) or consult specialized patent litigation databases. PACER allows users to search for appellate, district, and bankruptcy court case and docket information. For cases filed on or after March 1, 2012, all case information and documents are available through PACER. There are fees associated with accessing documents through PACER.

Proceedings overview

There is one active AIA trial proceeding on US patent 11699808, IPR2026-00408, which is currently in pending status. This means the patent's claims remain untested by PTAB proceedings so far, and a defendant would face the patent with all claims presumed valid.

IPR2026-00408 — Zhuhai CosMX Battery Co., Ltd. et al. v. Bolin Zhou

• Type: Inter Partes Review
• Filed: 2026-07-28
• Status: Pending. The petition has been filed and is awaiting a decision on institution.
• Judge panel: Not yet public as the proceeding is in its initial pending stage.
• Petition grounds: Not yet public; this information typically becomes available after the petition is formally accepted and docketed, and the patent owner has an opportunity to respond.
• Institution decision: Not yet issued. The PTAB has a statutory deadline of 6 months from the filing date (2026-07-28) to decide whether to institute the IPR.
• Final Written Decision: Not applicable; an FWD can only be issued if the IPR is instituted.
• Settlement / termination: Not applicable.
• Appeal: Not applicable.
• Defensive value: This proceeding indicates that Zhuhai CosMX Battery Co., Ltd. et al. are challenging the patent. If instituted and successful, it could invalidate claims, thereby reducing the patent's enforceability. However, at this pending stage, it does not yet impact the patent's presumed validity.

Strategic summary

Currently, all claims of US patent 11699808 are untested in PTAB proceedings, as IPR2026-00408 is still in the pending stage. No claims have been canceled, sustained, or otherwise modified by the PTAB.

Regarding the estoppel landscape, since no institution decision or final written decision has been issued for IPR2026-00408, there is no estoppel in effect under 35 U.S.C. § 315(e)(2) for this proceeding. If the IPR is instituted, and a Final Written Decision is issued, the petitioner and its privies would be estopped from raising any ground raised or that reasonably could have been raised during that IPR. All prior-art grounds are currently available for other potential defendants or petitioners.

At this time, there is only one IPR filed against this patent. There is no discernible pattern of multiple IPRs by the same petitioner or aggressive PTAB appeals by the patent owner yet.

Recommended next steps

IPR2026-00408 is currently pending. The key upcoming milestone is the institution decision, which is due approximately six months from the filing date of 2026-07-28. This decision will determine whether the PTAB will proceed with a full trial on the merits of the challenged claims.

Inventors

• Bolin Zhou (Ningde Amperex Technology Ltd)

Original assignee

The original assignee is Ningde Amperex Technology Ltd. Ningde Amperex Technology Ltd. is a major global manufacturer of lithium-ion batteries, primarily for consumer electronics and electric vehicles. They ship products embodying the claims of US11699808. The company is currently operating.

Assignment timeline

No assignment records were found for US patent 11699808 on the USPTO Patent Assignment Search database. This indicates that the original assignee, Ningde Amperex Technology Ltd., still owns the patent.

Timeline diagram

timeline
    title Ownership of US 11699808
    2021 : Filed by Ningde Amperex Technology Ltd
    2023 : Issued to Ningde Amperex Technology Ltd

NPE / troll-pattern signals

1. Shell-entity transfer — not present. The patent remains with the original operating company.
2. Known asserter in the chain — not present. The patent is held by Ningde Amperex Technology Ltd., which is an operating company, not a known NPE.
3. Repeat correspondent across the chain — not present. There are no recorded assignments.
4. Cascading transfers — not present. There are no recorded assignments.
5. Pre-litigation transfer — unclear. While there is ongoing litigation (Unified Patents reports a case filed in Texas Eastern District Court, 2:26-cv-00139), without assignment records, it's unclear if any transfers occurred within 6 months prior to this suit.
6. Bankruptcy fire-sale — not present. Ningde Amperex Technology Ltd. is an active, operating company.
7. Privateering — not present. The patent is held by the original operating company.
8. Defensive aggregator (anti-NPE) — not present. The patent is held by an operating company.

Verdict

Insufficient data. There are no recorded assignments for US patent 116999808 on the USPTO Assignment Center. Therefore, it is presumed that the original assignee, Ningde Amperex Technology Ltd., still holds the patent. Without any assignment records, it is not possible to determine if any NPE / patent-troll patterns are present in the ownership chain.

To identify the most relevant prior art for US patent 11699808, I will examine the "Citations" section of the patent document. Prior art generally refers to any evidence that an invention was already known or obvious before the effective filing date of a patent application, which can impact patentability based on novelty and non-obviousness criteria under 35 U.S.C. § 102.

Here are the patent citations listed for US11699808B2, along with a brief description and potential anticipation:

1. US5088870A

• Full Citation: US5088870A, Method for forming a two chambered can
• Publication Date: 1992-02-18 (Filing Date: 1987-08-27)
• Brief Description: This patent describes a method for forming a two-chambered can, which may involve bending and sealing operations for container structures. While it deals with forming a container, its relevance to a battery's specific curved side face and flange portion for sealing is likely in the broader concept of forming and sealing structures, rather than the specific battery chemistry or detailed package design.
• Potential Anticipation (35 U.S.C. § 102): This reference might generally relate to the concept of forming structures with bent or folded portions and sealing them. It could potentially anticipate broad aspects of forming a package with a protrusion segment. However, given its focus on cans rather than battery packaging, it's less likely to anticipate the specific design of the curved side face of an electrode body and the contoured flange portion with an adhesive layer as described in Claim 1 of US11699808. It may be cited for its manufacturing process of forming and sealing.

2. KR100670438B1

• Full Citation: KR100670438B1, Pouch Type Lithium Secondary Battery
• Publication Date: 2007-01-16 (Filing Date: 2005-11-29)
• Brief Description: This patent describes a pouch-type lithium secondary battery. Pouch batteries inherently involve flexible packaging and sealing mechanisms.
• Potential Anticipation (35 U.S.C. § 102): This is a highly relevant citation as it directly addresses pouch-type lithium secondary batteries. Claim 1 of US11699808 mentions a "battery" that "may be a soft pack battery" and "laminated battery," implying a pouch-type construction. If KR100670438B1 discloses an electrode body, a package with a first part covering a second plane, a second part protruding with a curved structure around a curved side face, and adherence via an adhesive layer, it could potentially anticipate Claim 1 and its dependent claims. The "poor sealing reliability and increased space" of prior art "vertical structure" side seals, mentioned in the background of US11699808, suggests that this Korean patent might represent such a prior art design. Further examination of its detailed structure would be necessary to determine precise anticipation.

3. US20090023058A1

• Full Citation: US20090023058A1, Pouch-type secondary battery
• Publication Date: 2009-01-22 (Filing Date: 2007-07-20)
• Brief Description: This patent application also describes a pouch-type secondary battery, indicating similar subject matter to KR100670438B1.
• Potential Anticipation (35 U.S.C. § 102): Similar to the Korean patent, this US publication is highly relevant. If it discloses a battery with an electrode body and a package featuring a first part covering a second plane, a second part protruding with a curved structure around a curved side face, and adherence via an adhesive layer, it could potentially anticipate Claim 1 and its dependent claims. The specific details of its sealing mechanism, particularly if it includes a curved or contoured design to improve sealing or reduce space, would be crucial for determining anticipation.

4. US20140212717A1

• Full Citation: US20140212717A1, Lithium-ion secondary battery and manufacturing method for same
• Publication Date: 2014-07-31 (Filing Date: 2011-08-25)
• Brief Description: This patent application details a lithium-ion secondary battery and its manufacturing method.
• Potential Anticipation (35 U.S.C. § 102): This reference is also highly relevant due to its focus on lithium-ion secondary batteries. The extent to which it describes the specific package design with a curved side face and a corresponding curved protrusion segment, adhered with an adhesive layer, will determine its anticipatory effect on Claim 1. Details regarding the sealing structure and how it addresses issues like sealing reliability or space occupation would be important for assessing anticipation.

5. US20140356672A1

• Full Citation: US20140356672A1, Battery pack
• Publication Date: 2014-12-04 (Filing Date: 2013-06-04)
• Brief Description: This patent application describes a battery pack, which typically comprises multiple individual battery cells and their enclosures.
• Potential Anticipation (35 U.S.C. § 102): While this patent addresses a "battery pack," it may include disclosures about the individual battery cells within the pack. If the individual cells or their packaging within the pack incorporate the features of Claim 1 (electrode body, package with first and second parts, curved structure, curved side face, adhesive layer), then this reference could be anticipatory. The level of detail provided for the individual cell packaging would be critical.

6. US20170005300A1

• Full Citation: US20170005300A1, Sealed storage battery
• Publication Date: 2017-01-05 (Filing Date: 2014-01-30)
• Brief Description: This patent application is titled "Sealed storage battery," which directly suggests a focus on battery sealing mechanisms.
• Potential Anticipation (35 U.S.C. § 102): This is a very pertinent citation given its title. If this reference describes a sealed storage battery with an electrode body and a package where a first part covers a second plane, a second part protrudes with a curved structure around a curved side face, and is adhered via an adhesive layer, it could directly anticipate Claim 1 and its dependent claims. Any specific solutions for improving sealing reliability or reducing package dimensions, particularly related to curved structures, would be highly relevant.

For all the above references, a thorough claim-by-claim comparison would be needed to definitively determine if they anticipate Claim 1 or any of its dependent claims under 35 U.S.C. § 102. Anticipation requires that every element of the claimed invention is found, either explicitly or inherently, in a single prior art reference. The filing date of US11699808 is 2021-07-13, and its priority date is 2017-11-17, so any prior art predating these dates would be relevant.

Obviousness under 35 U.S.C. § 103 requires an assessment of whether the differences between the claimed invention and the prior art are such that the invention as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art (POSITA). This analysis involves identifying the scope and content of the prior art, ascertaining the differences between the prior art and the claimed invention, and assessing the level of ordinary skill in the pertinent art. A rejection based on obviousness must clearly identify the relevant prior art, explicitly state which specific references are being combined, and provide a rationale for combining them.

US patent 11699808 claims a battery with a unique package design featuring a curved structure. The prior art cited during the prosecution of US11699808 includes several patent documents related to battery construction, particularly pouch-type secondary batteries.

For the purpose of an obviousness analysis, we will consider the following prior art references identified in the patent document itself:

• US5088870A (Method for forming a two chambered can)
• KR100670438B1 (Pouch Type Lithium Secondary Battery)
• US20090023058A1 (Pouch-type secondary battery)
• US20140212717A1 (Lithium-ion secondary battery and manufacturing method for same)
• US20140356672A1 (Battery pack)
• US20170005300A1 (Sealed storage battery)

Independent Claim 1:
"A battery, comprising: an electrode body, and a package, wherein the package comprises: a first part covering a second plane of the electrode body; and a second part protruding from the first part in a width direction of the electrode body, wherein the second part comprises a curved structure, the curved structure curves around a curved side face of the electrode body in a thickness direction perpendicular to the width direction, the second part including a first end connected to the first part and a second end opposite to the first end in the thickness direction, and the second part is adhered to the curved side face of the electrode body via an adhesive layer."

Potential Combinations and Rationale for Obviousness:

A person having ordinary skill in the art (POSITA) in battery packaging would be familiar with various sealing methods and package structures for secondary batteries, especially soft pack or pouch-type batteries, which are susceptible to sealing issues. The objective would be to improve sealing reliability and reduce the overall space occupied by the battery.

Combination 1: KR100670438B1 in view of US20090023058A1

• KR100670438B1 describes a pouch type lithium secondary battery. This reference would disclose a basic battery structure with an electrode body and a package. While the specific sealing mechanism might differ, it represents the general state of the art for pouch batteries.
• US20090023058A1 also describes a pouch-type secondary battery, likely showing different sealing or structural elements to enhance packaging integrity.

Rationale for Combination:
A POSITA, upon encountering the sealing issues in a standard pouch battery (such as those described in KR100670438B1, where side seals can have "poor sealing reliability" and "increase the space occupying by the side of the battery" as stated in the background of US11699808B2), would be motivated to seek improvements in sealing. US20090023058A1, or similar art, might disclose various configurations for battery packages aimed at improving durability or space efficiency. If US20090023058A1, for instance, taught or suggested a curved side face or a flange structure that protruded to create a better seal, a POSITA would readily combine this teaching with the basic pouch battery design. The motivation would be to overcome the identified problems of poor sealing reliability and increased space. The use of an adhesive layer is a common practice in battery manufacturing to secure package components, so adhering the parts would be obvious.

Combination 2: US20140212717A1 in view of US20140356672A1

• US20140212717A1 pertains to a lithium-ion secondary battery and its manufacturing method. This patent might describe an electrode body and a package, potentially with certain structural features for compactness or robustness.
• US20140356672A1 describes a battery pack, which often involves multiple battery cells and their associated packaging, including mechanisms for securing and sealing individual cells within the pack.

Rationale for Combination:
A POSITA designing a battery, as described in US11699808, aiming to achieve better sealing and a more compact form factor for a "soft pack battery" or "laminated battery," would look at existing solutions for battery construction and packaging. If US20140212717A1 disclosed a battery with an electrode body and a package, and US20140356672A1 (or similar art) showed a package with a curved structure or a protruding part for improved sealing or space utilization, a POSITA would be motivated to combine these features. The problem of "poor sealing reliability" and "increased space occupying by the side of the battery" would prompt a POSITA to incorporate known design elements (like curved or protruding flanges) that address these issues. The use of an adhesive layer for bonding is a well-known engineering solution for securing components.

General Obviousness Considerations for Claim 1:

• Curved Side Face of Electrode Body: The patent mentions that the "separator is a compressible structure. Therefore, in order not to increase the thickness of the laminated battery, the sides of the laminated battery are also prepared in an arc shape." This suggests that a curved side face on the electrode body itself could be an inherent characteristic or a known design choice in laminated batteries to manage separator displacement or optimize space, not a novel feature in isolation.
• Second Part with Curved Structure Protruding from the First Part: The concept of a package having a protruding part with a curved structure to accommodate a curved battery component or to create a robust seal is a matter of conventional mechanical design. Flanges, especially those designed to contour a curved surface, are common in packaging to ensure a tight fit and good adhesion.
• Adhered via an Adhesive Layer: The use of an adhesive layer (such as hot melt glue, acrylate, polyurethane, or epoxy structural glue, as described in the patent) for bonding components in a battery package is a routine engineering choice. The patent itself highlights that the "glue is coated and dripped to the flange portion" to "increase the adhesive force there, thereby ensuring the tightness." This confirms that adhesives are a standard means for achieving sealing.
• Motivation to Combine: The motivation to combine these elements stems directly from the known challenges in soft pack batteries: poor sealing reliability and inefficient space utilization due to vertical side seals. A POSITA would readily adapt known packaging techniques (curved flanges, protruding elements, and adhesives) to address these problems by creating a contoured fit that better accommodates the battery's shape and provides a more effective seal. The "contouring design" explicitly mentioned in US11699808B2 to increase the "gap between the side face 101 and the protrusion segment 201 to ensure the amount of the glue therebetween" reinforces this motivation.

In summary, the individual elements of Claim 1, such as the curved side face, the curved protruding package part, and the adhesive layer, appear to be known in the art or represent conventional design choices. The combination of these elements to improve sealing reliability and reduce space in a soft pack battery would likely have been obvious to a POSITA seeking to overcome these well-known problems in battery packaging.