Straumann USA LLC v. Smart Denture Conversions LLC

This case involves a post-grant review (PGR) proceeding initiated by Straumann USA LLC against Smart Denture Conversions LLC before the Patent Trial and Appeal Board (PTAB), challenging the validity of US patent 12156781.

Straumann USA LLC is the U.S. affiliate of the Straumann Group, a global leader in implant, restorative, and regenerative dentistry. The company manufactures and supplies dental implants, instruments, biomaterials, computer-aided design/manufacturing (CAD/CAM) prosthetics, digital equipment, software, and clear aligners. Straumann maintains a dominant market position in premium dental implants and also competes in the non-premium segment through brands like Neodent. Smart Denture Conversions LLC (SDC) is a family-run operating company specializing in technology to convert removable dentures into fixed prostheses, marketed under the "Smart On X" brand. Their core technology focuses on an efficient, closed-tray pickup system utilizing a "Separable Fastener Technology" for same-day provisional prosthetics in All-on-X procedures.

The specific technology accused in the context of this PGR is that covered by U.S. Patent 12156781, owned by Smart Denture Conversions LLC. However, a precise one-line technical sketch for patent 12156781, relating to dental technology, could not be readily identified through public search databases like the USPTO. Searches for this patent number primarily return unrelated inventions, such as a "Spontaneous pop-up display device" for patent 10,156,781, which is a different patent number. Given that Smart Denture Conversions LLC's core business is dental prosthetics, if patent 12156781 is indeed relevant to this case, it would likely pertain to their innovative methods or devices for converting dentures into fixed implant prostheses.

The procedural posture is a Post-Grant Review (PGR) before the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office (USPTO), filed on June 4, 2025, and currently instituted for trial. PGRs are administrative trial proceedings that allow a third party, such as Straumann USA LLC, to challenge the validity of a patent within nine months of its issuance. This venue is significant because it offers a specialized and generally faster forum for resolving patent validity disputes compared to federal court litigation. Petitioners in a PGR can challenge a patent on a broad range of grounds, including lack of novelty, obviousness, insufficient written description, lack of enablement, or indefiniteness, which is broader than the grounds available in an Inter Partes Review (IPR). In PGR proceedings, the challenged patent is not presumed valid, and claim terms are given their broadest reasonable interpretation.

This case is notable due to the direct competition between two significant players in the dental implant and prosthetics market. This PGR is likely part of a broader intellectual property dispute, as Smart Denture Conversions LLC had previously filed a patent infringement lawsuit against Straumann USA, LLC in the U.S. District Court for the District of Delaware (Case No. 1:24-cv-00507), accusing Straumann's NeoConvert dental system of infringing SDC's U.S. Patent No. 11,937,992. Straumann, in turn, filed an IPR (IPR2025-00956) challenging that specific patent. This PGR against patent 12156781 by Straumann suggests a strategic move to challenge additional patents in SDC's portfolio, highlighting the intense competition and the importance of intellectual property in the rapidly evolving dental technology sector. The outcome of these PTAB proceedings could significantly impact the market for dental prosthetics and conversion technologies.

Patent Litigation and Post-Grant Review: Straumann USA LLC v. Smart Denture Conversions LLC

This analysis covers the key legal developments in the patent infringement litigation, Smart Denture Conversions, LLC v. Straumann USA, LLC, Case No. 1:24-cv-00507-JCB, in the U.S. District Court for the District of Delaware, and the parallel Post-Grant Review (PGR) proceeding, Straumann USA LLC v. Smart Denture Conversions LLC, PGR2025-00054, before the Patent Trial and Appeal Board (PTAB).

I. District Court Patent Infringement Litigation (D. Del. Case No. 1:24-cv-00507-JCB)

Filing & Initial Pleadings:

• Complaint Filed (2024-04-23): Smart Denture Conversions, LLC (SDC) initiated a patent infringement lawsuit against Straumann USA, LLC in the District of Delaware. The initial complaint asserted U.S. Patent No. 11,937,992.
• First Supplemental Complaint Filed (2025-02-04): SDC filed a First Supplemental Complaint (ECF No. 34), which expanded the scope of the litigation to include additional patents, notably U.S. Patent No. 12,156,781, among others.

Pre-trial Motions of Substance:

• Motion to Dismiss (2024-07-29): Straumann USA, LLC filed a motion to dismiss SDC's initial complaint for failure to state a claim, challenging the validity of U.S. Patent No. 11,937,992.
• Motion to Dismiss Denied (2024-12-12): The District Court, through an Opinion and Order, denied Straumann's motion to dismiss, affirming the validity of the asserted patent (U.S. Patent No. 11,937,992) at that stage.
• Motion for Conditional Stay Pending PTAB Proceedings (2025-08-11): Straumann USA, LLC moved for a conditional stay of the district court case. The motion requested that the case be stayed pending the outcome of two parallel PTAB proceedings initiated by Straumann: IPR2025-00956 (challenging U.S. Patent No. 11,937,992) and PGR2025-00054 (challenging U.S. Patent No. 12,156,781). The proposed stay would take effect upon institution of either PTAB proceeding, remaining in place until the PTAB's final decision. SDC indicated its opposition to this motion. The outcome of this motion is not yet publicly available in the provided search results as of 2026-05-18.

Claim Construction (Markman) & Discovery Milestones:

• Scheduling Order (2025-01-30): The court issued a scheduling order setting various deadlines.
• Stipulated Protective Order (2025-03-04): A stipulated protective order was entered by the court.
• Initial Invalidity Contentions (2025-06-02): Straumann USA, LLC served its Initial Invalidity Contentions.
• Close of Non-Expert Discovery (2025-12-05): Non-expert discovery was set to conclude by this date.
• Claim Construction Briefing (2025-12-19 to 2026-02-20): Deadlines were established for claim construction briefing, with the opening brief due on December 19, 2025, and the joint claim construction brief due on February 20, 2026.
• Markman Hearing (Scheduled 2026-03-06): A Markman hearing, combined with a hearing on any motions for summary judgment, is scheduled for March 6, 2026.

Trial Events:

• Jury Trial (Scheduled 2026-10-19): A jury trial is scheduled to commence on October 19, 2026.

Final Disposition/Present Posture:
The district court litigation is currently active, with a Markman hearing scheduled for March 6, 2026, and a jury trial set to begin on October 19, 2026. The motion to stay pending PTAB proceedings is currently pending.

II. Parallel PTAB IPR/PGR Proceedings

PGR2025-00054 (challenging US Patent No. 12,156,781):

• Filed (2025-06-04): Straumann USA LLC filed a Post-Grant Review petition challenging U.S. Patent No. 12,156,781. This patent was asserted by SDC in the district court litigation.
• Institution Decision (2025-12-10): The PTAB instituted the PGR proceeding.
• Current Status: The PGR is currently pending, having been instituted. No final written decision has been issued yet.

IPR2025-00956 (challenging US Patent No. 11,937,992):

• Filed (2025-04-30): Straumann USA LLC filed an Inter Partes Review petition challenging U.S. Patent No. 11,937,992. This patent was also asserted by SDC in the district court litigation.
• Sotera Stipulation (2025-06-04): Straumann submitted a "Sotera stipulation" in support of its IPR petition. This stipulation binds Straumann not to pursue invalidity arguments in the district court litigation that were raised or reasonably could have been raised in the IPR, should the IPR be instituted.
• Institution Status: While the institution date for IPR2025-00956 is not explicitly stated in the provided results, Straumann's motion to stay references institution decisions likely by December 2, 2025. Given the "Sotera stipulation" and the motion to stay, it is highly probable that this IPR was also instituted.

Effect of PTAB Proceedings on Litigation:
The parallel PTAB proceedings have led Straumann to seek a conditional stay of the district court litigation. The institution of both the IPR and PGR means that the validity of the asserted patents is being simultaneously reviewed by the PTAB. This could significantly impact the district court case by potentially narrowing the claims or patents at issue, or even leading to a full stay or settlement depending on the PTAB's final decisions. The USPTO Director's new policy, effective October 20, 2025, where the Director determines institution for IPR and PGR trials, affects the institution decisions in these cases.

Straumann USA LLC is represented by attorneys from Haug Partners LLP in the Post-Grant Review (PGR) proceeding PGR2025-00054.

The counsel of record for Straumann USA LLC includes:

• Georg Reitboeck

  • Role: Lead Counsel (Provisionally Recognized PTAB Attorney)
  • Firm: Haug Partners LLP, New York, NY
  • Note: Reitboeck has submitted a declaration in support of a Notice of Intent to Designate a Provisionally Recognized PTAB Attorney for this matter.

• Mark Chapman (also appears as Morgan A. Chapman in some PTAB contexts)

  • Role: Lead Counsel (Provisionally Recognized PTAB Attorney)
  • Firm: Haug Partners LLP, New York, NY
  • Note: Chapman has also submitted a declaration in support of a Notice of Intent to Designate a Provisionally Recognized PTAB Attorney. He is also listed in the related IPR2025-00956 case.

• Christopher Gosselin

  • Role: Lead Counsel (Provisionally Recognized PTAB Attorney)
  • Firm: Haug Partners LLP, Washington, DC
  • Note: Gosselin has submitted a declaration in support of a Notice of Intent to Designate a Provisionally Recognized PTAB Attorney.

These attorneys were also identified as "Of Counsel" for Straumann USA, LLC in a related district court case, Smart Denture Conversions, LLC v. Straumann USA, LLC, No. 1:24-cv-00507-JCB (D. Del.), from which a document listing their involvement in the PGR was sourced.

Counsel of Record for Smart Denture Conversions LLC in PGR2025-00054

Smart Denture Conversions LLC, the Patent Owner in PGR2025-00054, is represented by counsel from Smith, Anderson, Blount, Dorsett, Mitchell & Jernigan LLP.

• Kelsey I. Nix

  • Role: Lead Counsel
  • Firm: Smith, Anderson, Blount, Dorsett, Mitchell & Jernigan LLP
  • Office Location: (Specific office location not detailed in search results, but the firm is based in Raleigh, NC).
  • Experience Note: Mr. Nix's practice includes patent, commercial, and appellate litigation. He is lead counsel for Smart Denture Conversions LLC in the related IPR2025-00956 proceeding and has discussed strategy for PGR2025-00054.

• John L. Gibbons

  • Role: Back-up Counsel
  • Firm: Smith, Anderson, Blount, Dorsett, Mitchell & Jernigan LLP
  • Office Location: (Specific office location not detailed in search results, but the firm is based in Raleigh, NC).
  • Experience Note: Mr. Gibbons is an associate whose practice includes patent, commercial, and appellate litigation. He has applied for pro hac vice admission in PGR2025-00054 and has discussed the strategy, arguments, and evidence in this proceeding with Mr. Nix.