PTAB challenges

Proceedings overview

One AIA trial proceeding has been filed against US patent 10306667. This proceeding resulted in a discretionary denial, meaning no claims were challenged on the merits, and the patent's claims remain untested by the PTAB. This gives a defendant facing assertion a defensive posture where the patent is not yet "hardened" by surviving IPRs on the merits.

IPR2025-01099 — GENERAC POWER SYSTEMS, INC. et al. v. LG Electronics Inc.

• Type: Inter Partes Review
• Filed: 2025-06-17
• Status: Discretionary Denial
• Judge panel: Not publicly available yet for this stage, but often disclosed in institution decisions or denials.
• Petition grounds: Details of claims, art, and statutory basis (§ 102 / § 103 / § 112) are typically outlined in the petition. However, since the petition was discretionarily denied, these grounds were not substantively reviewed.
• Institution decision: Denied on 2026-03-05. The proceeding was terminated via a discretionary denial, indicating that the PTAB declined to institute the IPR.
• Final Written Decision: Not issued, as the petition was discretionarily denied.
• Settlement / termination: The proceeding was terminated due to a discretionary denial. No settlement terms are publicly available.
• Appeal: No appeal to the Federal Circuit, as there was no Final Written Decision.
• Defensive value: The discretionary denial means the merits of the challenged claims were not assessed by the PTAB. While the patent owner prevailed in preventing the IPR, the patent has not been subjected to the rigor of a full IPR trial, nor have its claims been judicially affirmed or invalidated. The specific reasons for the discretionary denial (e.g., related litigation, serial petitions) would be crucial to understand for future defensive strategies.

Strategic summary

All claims of US10306667 remain UNTESTED by the PTAB. The single IPR filed, IPR2025-01099, was met with a discretionary denial, meaning the Board chose not to institute the trial. This leaves all claims of the patent intact as far as PTAB proceedings are concerned.

The estoppel landscape under § 315(e)(2) for IPR2025-01099 would bar Generac Power Systems, Inc. (and its privies) from asserting in other venues any ground that was raised or reasonably could have been raised in the petition. However, for other potential defendants, the grounds and prior art asserted in IPR2025-01099 are still available to be raised in a new IPR petition or in district court litigation, as the merits were not reached by the PTAB.

There are no apparent pattern signals such as multiple IPRs from the same petitioner or aggressive PTAB appeals by the patent owner, as only one proceeding exists, and it was denied institution. The petitioner, Generac Power Systems, Inc., is not typically known as a defensive aggregator like Unified Patents.

Recommended next steps

For a defendant facing assertion of this patent, it is recommended to investigate the specific reasons for the discretionary denial in IPR2025-01099. The denial decision, which was issued on 2026-03-05, would provide critical insight into the PTAB's reasoning for declining institution. This information can inform whether a new IPR petition, potentially with different grounds or arguments, would have a higher chance of institution. Without a Final Written Decision, there are no claims invalidated to cite.