PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US patent 11347656. This proceeding was terminated via settlement, meaning no claims were formally invalidated or sustained by the PTAB. Consequently, the patent remains unhardened by a PTAB final written decision, and all claims are currently untested in an AIA trial. For a defendant, this means an IPR-based defense is still a viable option, as the patent's validity has not been affirmed by the PTAB.

IPR2025-01377 — [[[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: 2025-08-05
• Status: Terminated-Settled. This indicates the parties reached a settlement agreement and the proceeding was concluded without a Final Written Decision on the merits.
• Judge panel: Information not publicly available.
• Petition grounds: Details regarding the specific claims challenged, prior art, and statutory bases (§ 102 / § 103 / § 112) are not publicly available due to the settlement and lack of an institution decision or final written decision.
• Institution decision: The proceeding was terminated as settled before an institution decision was issued.
• Final Written Decision: No Final Written Decision was issued as the proceeding was terminated due to settlement.
• Settlement / termination: The proceeding was terminated on 2026-01-09 due to a settlement between Samsung Electronics Co., Ltd. et al. and Radian Memory Systems LLC. The specific terms of the settlement are confidential.
• Appeal: No appeal to the Federal Circuit occurred, as the proceeding was terminated by settlement before a Final Written Decision.
• Defensive value: This proceeding concluded without a ruling on the patentability of the challenged claims. As such, the claims of US11347656 remain untested at the PTAB. For a defendant, this means the patent has not been validated by the PTAB, and an IPR challenge on similar or different grounds could still be mounted. The prior art asserted by Samsung in this IPR is not publicly known, so its availability for future challenges by other parties is unaffected by this settlement.

Strategic summary

All claims of US11347656 are currently UNTESTED at the PTAB. The single IPR filed, IPR2025-01377, was terminated due to a settlement between the petitioner (Samsung Electronics Co., Ltd. et al.) and the patent owner (Radian Memory Systems LLC) before an institution decision or Final Written Decision was rendered. Therefore, no claims have been formally canceled or sustained by the PTAB.

The estoppel landscape is minimal. Since IPR2025-01377 settled prior to institution, neither the petitioner nor its privies are estopped under 35 U.S.C. § 315(e)(1) or (2) from raising any grounds that were or reasonably could have been raised in the settled IPR. The specific prior art cited in the petition is not publicly known, but the settlement does not preclude other parties (or even the same petitioner, if not barred by the settlement agreement itself) from asserting new or even similar prior art against the patent in a future PTAB proceeding or district court litigation. The lack of an institution decision means the PTAB did not make any preliminary findings regarding the likelihood of success on the merits for any challenge grounds.

There is no pattern of aggressive PTAB appeals by the patent owner or multiple IPRs by the same petitioner for this specific patent within the provided data. However, it's notable that the Google Patents record indicates an IPR2025-01377 case filed by "Unified Patents PTAB Data" as well as a Texas Eastern District Court case, suggesting the patent is being asserted. The official PTAB record for IPR2025-01377 lists Samsung Electronics Co., Ltd. et al. as the petitioner, so the Unified Patents mention might be related to their data tracking rather than their direct petitioning of this specific IPR.

Recommended next steps

Since IPR2025-01377 was terminated-settled and no institution decision or Final Written Decision was issued, there are no PTAB opinions to link to regarding claim validity. The patent's claims remain unadjudicated by the PTAB. A defendant facing assertion of this patent should evaluate the strength of the claims and available prior art for a potential new IPR challenge. The absence of a PTAB decision means there's no judicial hardening of the patent's claims, which could make a new IPR a potent defensive strategy.

The status "Terminated-Settled" means there are no active proceedings or upcoming trial-stage milestones for IPR2025-01377.