PTAB challenges

Proceedings overview

The patent US12166869 has been subject to one AIA trial proceeding, IPR2026-00117, which resulted in an institution denied status. This outcome means that the patent's claims remain undisturbed by this particular challenge, providing a degree of hardening against similar future assertions for the specific grounds raised in this petition.

IPR2026-00117 — [[[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. Network-1 Technologies, Inc.

• Type: Inter Partes Review
• Filed: 2025-11-20
• Status: Institution Denied – The Patent Trial and Appeal Board (PTAB) declined to initiate the review.
• Judge panel: The decision was issued by John A. Squires, Under Secretary of Commerce for Intellectual Property and Director of the United States Patent and Trademark Office.
• Petition grounds: The specific claims challenged, prior art references, and statutory bases (§ 102 / § 103 / § 112) for the petition grounds are not publicly available in the provided search results.
• Institution decision: Denied on 2026-05-06. Institution of inter partes review was denied "pursuant to 35 U.S.C. § 314(a), after review of discretionary and non-merits considerations". This indicates a denial based on the Director's discretion rather than on the merits of the patentability challenge.
• Final Written Decision: Not applicable, as institution was denied.
• Settlement / termination: Not applicable, as institution was denied.
• Appeal: Not applicable, as institution was denied and there was no Final Written Decision to appeal.
• Defensive value: This proceeding indicates that, for the specific arguments and prior art presented by Samsung Electronics Co., Ltd. et al. in this IPR, the patent owner, Network-1 Technologies, Inc., prevailed at the institution stage. Any future IPR challenge based on the same or substantially similar grounds and arguments will likely face estoppel under 35 U.S.C. § 315(e)(1).

Strategic summary

Currently, all claims of US12166869 remain SUSTAINED and UNTESTED by any AIA trial proceeding that reached a merits decision. The sole IPR filed against the patent, IPR2026-00117, resulted in an institution denial based on discretionary and non-merits considerations by the USPTO Director. This means no claims of US12166869 have been canceled through a PTAB Final Written Decision.

Regarding the estoppel landscape, since institution was denied, the petitioner (Samsung Electronics Co., Ltd. et al.) is generally barred by 35 U.S.C. § 315(e)(1) from asserting in other venues (like district court or the ITC) any ground of unpatentability that it raised or reasonably could have raised in its IPR petition. However, without knowing the specific claims and prior art challenged in the petition, it is impossible to precisely define the scope of estoppel. For other potential defendants, all prior-art grounds remain available for challenge, unless they are in privity with Samsung. The denial based on discretionary factors, rather than a merits-based finding, signals a potentially more difficult path for petitioners navigating the current PTAB landscape under Director Squires, which has seen an increase in discretionary denials based on factors such as domestic industry and real party in interest issues.

Recommended next steps

• For any defendant facing assertion of US12166869, it's crucial to obtain and review the full institution denial decision for IPR2026-00117 (Paper 12, available via the USPTO PTAB End-to-End system) to understand the exact discretionary basis for the denial and the specific claims and prior art that were challenged. This will inform whether a new IPR petition could overcome the discretionary hurdles and avoid estoppel.
• Given the recent trend of discretionary denials at the PTAB, any new IPR petition should carefully consider and address the USPTO Director's guidelines on institution, particularly regarding domestic manufacturing, real party in interest, and parallel litigation.
• There are no active proceedings pending against US12166869. The patent has survived its first IPR challenge, meaning its claims remain valid as far as PTAB proceedings are concerned.