PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US patent 11825139. This proceeding is currently active and pending, meaning no claims have been invalidated or sustained by the PTAB yet. This gives a defendant a posture where the patent's claims are currently untested by PTAB review.

IPR2026-00365 — Pinterest, Inc. v. OpenTV Inc.

• Type: Inter Partes Review
• Filed: 2026-05-22
• Status: Pending. This IPR was very recently filed and is in the initial stages of review.
• Judge panel: Not yet publicly available as the proceeding is in its early stages.
• Petition grounds: Not yet publicly available in the initial stages of the proceeding.
• Institution decision: Not yet issued. Given the filing date of 2026-05-22, the institution decision is due approximately three months from the filing of the Patent Owner Preliminary Response, or six months from the filing date if no preliminary response is filed, typically around late 2026 or early 2027.
• Final Written Decision (if issued): Not issued.
• Settlement / termination: No settlement or termination has occurred.
• Appeal: No appeal has been filed.
• Defensive value: This proceeding is in its earliest stages, so it does not yet provide any definitive defensive value regarding claim validity. Its existence indicates that Pinterest, Inc. believes there are grounds to challenge the patent.

Strategic summary

Currently, all claims (claims 1-19) of US patent 11825139 are untested by PTAB review. There are no canceled or sustained claims as of today's date, May 23, 2026. The single IPR, IPR2026-00365, was filed only one day ago, and thus no claims have been addressed by the PTAB.

Regarding estoppel, since IPR2026-00365 is in its nascent stage, no estoppel has attached under § 315(e)(2). Once an institution decision is made and if a final written decision is issued, Pinterest, Inc. (and its privies) would be estopped from asserting grounds raised or that reasonably could have been raised in the IPR. At this time, all prior-art grounds remain theoretically available to other potential defendants.

The filing of this IPR by Pinterest, Inc. signals that at least one entity believes US11825139 is vulnerable to challenge under the AIA. There is no pattern yet, as this is the first recorded PTAB proceeding for this patent.

Recommended next steps

• Monitor IPR2026-00365: Keep a close watch on the progress of IPR2026-00365. The critical upcoming milestone is the institution decision, which will indicate whether the PTAB believes there is a reasonable likelihood that at least one claim is unpatentable. This decision is expected around late 2026 or early 2027.
• Review Petition: Once the petition for IPR2026-00365 becomes publicly available, analyze the grounds raised by Pinterest, Inc. to understand their specific invalidity arguments against the claims of US11825139. This will provide insight into the patent's potential weaknesses.
• No PTAB activity beyond this: Other than IPR2026-00365, there is no other PTAB activity for US11825139 on file. This means the patent has not been subjected to any other post-grant challenges.