PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US Patent 11,916,893. This proceeding, IPR2026-00119, has a status of "Institution Denied," meaning the PTAB declined to initiate a trial. This indicates a relatively strong defensive posture for the patent owner, as the claims have not been challenged in an inter partes review trial.

IPR2026-00119 — [[[Samsung Electronics Co.](/litigations/by-defendant/Samsung%20Electronics%20Co.), Ltd.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.) et al.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.%20et%20al.) v. John A. Nix

• Type: Inter Partes Review
• Filed: 2025-11-26
• Status: Institution Denied. The PTAB declined to institute the inter partes review trial, meaning a full trial on the merits was not conducted.
• Judge panel: The panel consisted of Administrative Patent Judges Jessica B. Hygh, Michael P. Tierney, and Jason J. Berti.
• Petition grounds: The petition challenged claims 1-20 of U.S. Patent No. 11,916,893 as unpatentable under 35 U.S.C. §§ 102 and 103 over various combinations of prior art, including U.S. Patent No. 8,620,248 (Stahl) and U.S. Patent Application Publication No. 2012/0315891 (Hansson).
• Institution decision: Denied on 2026-05-06. The PTAB denied institution, finding that the Petitioner, Samsung Electronics Co., Ltd. et al., failed to demonstrate a reasonable likelihood that it would prevail with respect to at least one of the challenged claims. Specifically, the Board determined that the petition did not adequately address how certain limitations of the challenged claims were met by the cited prior art.
• Final Written Decision: Not issued, as institution was denied.
• Settlement / termination: The proceeding was terminated due to the denial of institution, not a settlement.
• Appeal: Not applicable, as institution was denied.
• Defensive value: The denial of institution for IPR2026-00119 is a favorable outcome for the patent owner. It indicates that the PTAB considered the petitioner's arguments insufficient to warrant a full review of claims 1-20, thereby strengthening the patent against these specific prior art challenges and preserving the patentability of all challenged claims.

Strategic summary

All claims (1-20) of US11916893 remain UNTESTED by a full PTAB trial. While claims 1-20 were challenged in IPR2026-00119, the PTAB denied institution, meaning no claims were ever canceled or formally sustained by a Final Written Decision. This leaves the patent un-narrowed by this proceeding.

The estoppel landscape for IPR2026-00119 means that Samsung Electronics Co., Ltd. and their privies are barred under 35 U.S.C. § 315(e)(1) from challenging claims 1-20 in future PTAB proceedings on any ground that they raised or reasonably could have raised in their petition. However, other potential defendants or petitioners are not subject to this estoppel and are still free to challenge the patent on any available prior-art grounds. The denial of institution itself signals that the PTAB did not find a strong prima facie case for unpatentability based on the specific arguments and prior art presented in that particular petition. There is no pattern of multiple IPR filings on this patent, and no evidence of aggressive PTAB appeals by the patent owner.

Recommended next steps

For a defendant facing assertion of this patent, it is recommended to obtain and carefully review the Institution Decision for IPR2026-00119 (Paper 11 from the USPTO PTAB E2E system for IPR2026-00119, dated 2026-05-06) to understand the specific reasons the Board denied institution. This will provide insight into the perceived weaknesses of Samsung's arguments and prior art, which can inform the development of new invalidity contentions or the strategy for any future PTAB challenges.