PTAB challenges

Proceedings overview

There is one pending AIA trial proceeding on US patent 12502870, a Post-Grant Review (PGR) filed by Ambilight Inc. This means the patent's claims are currently undergoing examination at the PTAB, leaving the defensive posture somewhat uncertain until a final decision is reached.

PGR2026-00053 — Ambilight Inc. v. Lannray Optoelectronics Zhenjiang Co Ltd

• Type: Post-Grant Review
• Filed: 2026-06-01
• Status: Pending
• Judge panel: Not yet publicly available.
• Petition grounds: Not yet publicly available.
• Institution decision: Not yet issued. The institution decision is due within six months of the filing date, around December 1, 2026.
• Final Written Decision (if issued): Not yet issued.
• Settlement / termination: No settlement or termination on file.
• Appeal: No appeal yet, as no Final Written Decision has been issued.
• Defensive value: This active PGR proceeding indicates that the patentability of US12502870's claims is currently being challenged. A defendant facing assertion of this patent should closely monitor the progress and outcome of this PGR, as a successful challenge could invalidate some or all claims, significantly impacting any infringement theories.

Strategic summary

Currently, all claims of US12502870 are UNTESTED by a Final Written Decision, as the single pending PGR is still in its early stages. There are no canceled or sustained claims as of 2026-06-02.

The estoppel landscape is not yet established for this patent, as there has been no institution decision or final written decision in PGR2026-00053. Once an institution decision is made, and potentially a Final Written Decision, the petitioner (Ambilight Inc.) and its privies would be barred from raising any ground that was raised or reasonably could have been raised in the proceeding.

The filing of a PGR by Ambilight Inc. suggests that this patent may become a target for further challenges, especially if it is being actively asserted.

Recommended next steps

Since PGR2026-00053 is pending, a defendant should closely track its progress. The key upcoming milestone is the institution decision, expected around 2026-12-01. If the PGR is instituted, the trial will proceed, with a Final Written Decision due approximately one year from institution. Monitoring the petition grounds, the institution decision, and ultimately the Final Written Decision will be crucial to understand the defensive value and scope of the patent claims.