PTAB challenges

Proceedings overview

There is one ongoing inter partes review (IPR) filed against U.S. Patent No. 10,687,281. The Patent Trial and Appeal Board (PTAB) has instituted trial, meaning the petitioner demonstrated a reasonable likelihood of prevailing on at least one challenged claim. This proceeding creates significant uncertainty for the patent owner and offers a potential defensive shield for a company accused of infringement, as the challenged claims could be invalidated.

IPR2025-00988 — Samsung Electronics Co., Ltd. et al. v. Wilus Institute of Standards and Technology Inc.

• Type: Inter Partes Review
• Filed: 2025-05-20
• Status: Trial Instituted. The PTAB has determined that the petitioner, Samsung, has shown a reasonable likelihood that it will prevail in showing the unpatentability of at least one of the challenged claims. A final decision is pending.
• Judge panel: Information not yet publicly available.
• Petition grounds: Public records for this proceeding are still populating. The specific claims challenged and the prior art references asserted will be detailed in the petition, which should be available on the PTAB's End-to-End (E2E) system. IPRs are limited to invalidity grounds based on patents and printed publications under 35 U.S.C. §§ 102 (novelty) and 103 (obviousness).
• Institution decision: The trial was instituted on 2026-05-12. The specific reasoning for institution will be detailed in the Board's decision, which will identify the claims and grounds for which the trial will proceed.
• Final Written Decision: Not yet issued. The statutory deadline for a final decision is one year from the institution date, approximately 2027-05-12.
• Settlement / termination: No settlement has been recorded. The proceeding is active.
• Appeal: Not applicable at this stage.
• Defensive value: This is a high-value proceeding for a potential defendant. The institution of trial signifies that the petitioner's invalidity arguments have substantial merit. A defendant should closely monitor this case, as a final decision invalidating claims could resolve an infringement dispute. Even pending a final decision, the instituted IPR provides a strong basis for seeking a stay of any parallel district court litigation.

Strategic summary

All claims of U.S. Patent No. 10,687,281 are currently at risk in the pending IPR. No claims have been finally adjudicated as canceled or sustained by the PTAB. The patent owner, Wilus Institute of Standards and Technology Inc., is actively defending the patent in this proceeding.

Once the IPR concludes with a Final Written Decision, the petitioner (Samsung and any real parties-in-interest) will be subject to statutory estoppel under 35 U.S.C. § 315(e)(2). This will prevent them from later challenging the surviving claims in district court or the ITC on any invalidity grounds that they raised or reasonably could have raised in the IPR. Other potential defendants, however, would not be estopped and could still challenge the patent's validity in court or at the PTAB, although the arguments and prior art used in the instituted IPR will provide a valuable roadmap of what is likely to succeed or fail. The patent owner has also engaged in litigation regarding this patent family, indicating a pattern of enforcement.

Recommended next steps

For a defendant facing a claim of infringement of U.S. Patent No. 10,687,281, the immediate next steps should be:

• Monitor the IPR: The most critical action is to actively monitor the status of IPR2025-00988 on the USPTO's PTAB E2E portal. Key upcoming events will include the Patent Owner's Response, the oral hearing, and the Final Written Decision, which is due by approximately May 12, 2027.
• Analyze the IPR File: Download and thoroughly analyze the Petition and the Institution Decision from the PTAB E2E portal for IPR2025-00988. These documents will detail the specific claims at issue and the prior art asserted against them. The Board's institution decision will explain which arguments it found persuasive, offering a preview of the patent's potential vulnerabilities.
• Consider a Stay: If you are sued for infringement, the instituted IPR provides a strong basis to file a motion to stay the district court case pending the PTAB's final decision. Courts frequently grant such stays to conserve judicial resources and benefit from the USPTO's expert review.