PTAB challenges

Proceedings overview

A single AIA trial proceeding, IPR2025-01321, was filed against US patent 11709772 and subsequently terminated due to settlement. This means no claims of the patent were invalidated or sustained by the PTAB, and therefore the patent's validity remains untested in an AIA trial. This gives a defendant facing assertion of this patent a neutral defensive posture regarding PTAB-adjudicated claim validity.

IPR2025-01321 — [[[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. Radian Memory Systems LLC

• Type: Inter Partes Review
• Filed: 2025-07-17
• Status: Terminated-Settled. This indicates that the parties involved reached a confidential agreement, leading to the conclusion of the proceeding without a final judgment on the patentability of the challenged claims.
• Judge panel: Information regarding the specific judge panel assigned to this proceeding is not publicly available.
• Petition grounds: Details concerning the specific claims challenged, the prior art asserted, and the statutory basis (§ 102 / § 103 / § 112) of the petition are not publicly available, as the proceeding terminated before an institution decision or final written decision was issued.
• Institution decision: The outcome of the institution decision (instituted, denied, or partially instituted) and any associated reasoning are not publicly available. The termination by settlement likely occurred before or shortly after the PTAB's deadline for issuing an institution decision.
• Final Written Decision: No Final Written Decision was issued for this proceeding, as it was terminated due to settlement.
• Settlement / termination: The proceeding was terminated as settled on 2026-01-09. The specific terms and conditions of the settlement agreement are confidential.
• Appeal: No appeal was filed with the Federal Circuit, as there was no Final Written Decision from the PTAB to appeal.
• Defensive value: Since this IPR was terminated by settlement without a final PTAB decision on the merits, no claims of US11709772 were invalidated. This means that for a defendant currently facing assertion of this patent, the claims maintain their original scope and validity as issued by the USPTO. An IPR-based defense is still a viable strategy, as the claims have not been hardened by surviving a PTAB trial.

Strategic summary

US patent 11709772 has been involved in one Inter Partes Review, IPR2025-01321, which was filed by Samsung Electronics Co., Ltd. et al. against Radian Memory Systems LLC. This proceeding concluded with a "Terminated-Settled" status on 2026-01-09. As a result, no claims of US11709772 have been formally canceled or sustained by the PTAB. All claims of the patent remain as originally issued, and their patentability has not been adjudicated in an AIA trial.

Given the "Terminated-Settled" status without an issued Final Written Decision, the estoppel provisions of 35 U.S.C. § 315(e)(2) are not triggered. Therefore, Samsung (and its privies) are not statutorily barred from raising any invalidity grounds they raised or reasonably could have raised in future proceedings, although any specific terms of their private settlement agreement would govern their future actions. For any other potential defendant, the full range of prior-art grounds remains available for challenging the patent's validity, as there has been no PTAB ruling on the merits of patentability for any claim. There is no discernible pattern of multiple IPRs from the same petitioner or aggressive PTAB appeals by the patent owner based on this single, settled proceeding.

Recommended next steps

Currently, there are no active PTAB proceedings concerning US patent 11709772. The sole IPR, IPR2025-01321, was terminated through a settlement between the parties. For a defendant facing assertion of this patent, this indicates that the patent's claims have not been subjected to a full PTAB validity review and thus remain untested in an AIA trial. The absence of any PTAB-adjudicated claim invalidation means that an IPR challenge remains a potential defensive strategy, with all prior art grounds available. There are no impending trial-stage milestones, institution decision deadlines, or FWD due dates to track for this patent.