PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US patent 11681614. The proceeding, IPR2025-01289, was terminated due to settlement. This means the patent's claims have not been challenged to a final written decision at the PTAB, and therefore, no claims have been invalidated or sustained by the Board. The defensive posture remains largely unchanged by this proceeding, as the merits of the claims were not fully adjudicated.

IPR2025-01289 — [[Samsung Electronics America, Inc.](/litigations/by-plaintiff/Samsung%20Electronics%20America%2C%20Inc.) et al.](/litigations/by-defendant/Samsung%20Electronics%20America%2C%20Inc.%20et%20al.) v. Radian Memory Systems LLC

• Type: Inter Partes Review
• Filed: 2025-07-14
• Status: Terminated-Settled – The proceeding concluded due to a settlement between the parties.
• Judge panel: Not publicly available at this stage of termination.
• Petition grounds: Not publicly available due to early settlement.
• Institution decision: Not applicable, as the proceeding was terminated prior to an institution decision.
• Final Written Decision (if issued): Not 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 America, Inc. et al. and Radian Memory Systems LLC. The specific terms of the settlement are confidential.
• Appeal: Not applicable, as no Final Written Decision was issued.
• Defensive value: This proceeding does not provide a definitive judgment on the patentability of the claims of US11681614. While the petitioner initially challenged the patent, the settlement means the claims were not tested through to a final decision. Therefore, a defendant facing assertion of this patent today would still need to conduct their own analysis of claim validity and potential prior art.

Strategic summary

Currently, all claims of US patent 11681614 are UNTESTED by a Final Written Decision at the PTAB. The single IPR proceeding, IPR2025-01289, was terminated due to a settlement, meaning the patent claims were not adjudicated for patentability. This leaves the full scope of the patent claims intact from a PTAB perspective.

Regarding the estoppel landscape, since no institution decision was reached and no Final Written Decision was issued, the estoppel provisions of § 315(e)(2) are unlikely to apply to Samsung Electronics America, Inc. et al. or its privies with respect to grounds that "were raised or reasonably could have been raised." However, the exact terms of the settlement agreement, which are confidential, could include specific covenants not to challenge the patent further. For a new defendant being asserted against, all prior-art grounds remain theoretically available, as there has been no PTAB finding on the merits of the patent's claims.

The termination by settlement suggests that the parties reached a business resolution rather than seeing the IPR through to a final decision on patentability. The petitioner was "Samsung Electronics America, Inc. et al." and the patent owner is "Radian Memory Systems LLC". There is no public indication of the same petitioner filing multiple IPRs on this patent or any aggressive pursuit of PTAB appeals by the patent owner from this single, terminated proceeding. The involvement of Samsung indicates a significant entity was interested in challenging the patent.

Recommended next steps

Since there are no active PTAB proceedings and no claims have been invalidated by the PTAB, a defendant should proceed with a thorough prior art search and invalidity analysis if facing assertion of US patent 11681614. The absence of a Final Written Decision means the patent's claims have not been "hardened" by surviving an IPR.