PTAB challenges

Proceedings overview

One AIA trial proceeding has been filed against US Patent 9,525,084, which is currently terminated. This gives a defendant some defensive information, as the proceeding indicates a challenge to the patent's validity, though the "Procedural Termination" suggests the merits of the challenge were not fully adjudicated in a Final Written Decision.

IPR2025-00997 — [[[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. W&wsens Devices Inc.

• Type: Inter Partes Review
• Filed: 2025-07-14
• Status: Terminated
• Judge panel: Not publicly available without accessing the full PTAB record.
• Petition grounds: Not publicly available without accessing the full PTAB record.
• Institution decision: Not publicly available, as the case was terminated.
• Final Written Decision (if issued): Not issued due to procedural termination.
• Settlement / termination: The proceeding was terminated on 2026-03-09. The reasons for procedural termination are not specified in the provided data. [cite: "IPR2025-00997 — IPR — filed 2025-07-14 — last modified 2026-03-09 — status: Terminated — petitioner: Samsung Electronics Co., Ltd. et al. — inventor: Shih-Yuan WANG et al"]
• Appeal: No Federal Circuit appeal on record due to procedural termination.
• Defensive value: While the petition itself indicates that Samsung Electronics Co., Ltd. et al. found grounds to challenge the patent, the procedural termination means there is no final determination on the validity of any claims. This leaves the claims untested by a full IPR proceeding.

Strategic summary

The patent US9525084 has one IPR proceeding, IPR2025-00997, which was filed by Samsung Electronics Co., Ltd. et al. and subsequently terminated. As a result, all claims of US9525084 remain UNTESTED by a final written decision from the PTAB. There are no claims that have been formally canceled or sustained through an IPR.

Regarding the estoppel landscape, § 315(e)(2) estoppel bars the petitioner (Samsung Electronics Co., Ltd. et al.) and their privies from raising any ground that was raised or reasonably could have been raised in IPR2025-00997. However, because the proceeding was procedurally terminated without an institution decision or final written decision, the scope of estoppel may be limited. For a new defendant being asserted against, this means that most prior-art grounds are likely still available for a new IPR petition, as the merits were not decided.

The IPR was filed by Samsung Electronics Co., Ltd. et al., and Unified Patents is also listed in connection with a related PTAB case (IPR2025-00997) in the litigation status, indicating that there may be a defensive aggregator involved in the broader patent family's litigation. [cite: "PTAB case IPR2025-00997 filed (Procedural Termination) Petitioner: "Unified Patents PTAB Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License."]

Recommended next steps

Since IPR2025-00997 was terminated, there is no Final Written Decision to link to that would invalidate any claims. If you are a defendant facing assertion of this patent, you should perform your own prior art search and consider filing a new IPR petition, as the claims have not been substantively reviewed by the PTAB.