PTAB challenges

Proceedings overview

One AIA trial proceeding is on file for US patent 10926218, IPR2025-00717, which is currently pending and noted as having reached a settlement. This means the patent's claims have not been formally invalidated by the PTAB through a Final Written Decision. The defensive posture for a defendant facing assertion of this patent is that the validity of its claims remains officially untested by a PTAB final decision, although the settlement suggests a resolution was reached between the parties.

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IPR2025-00717 — PacifiCorp et al. v. MES, Inc.

• Type: Inter Partes Review
• Filed: 2025-04-08
• Status: Pending (Settlement). This IPR was filed and subsequently terminated due to a settlement between the parties.
• Judge panel: Information regarding the specific judge panel for this IPR is not publicly available at this stage through the provided search results.
• Petition grounds: Details on the specific claims challenged, the prior art asserted, and the statutory bases (§ 102 / § 103 / § 112) for the petition are not publicly available from the search results for this settled proceeding.
• Institution decision: The institution decision is not explicitly detailed in the provided search results due to the settlement status.
• Final Written Decision: No Final Written Decision was issued as the proceeding concluded with a settlement.
• Settlement / termination: The proceeding was settled, as indicated by the status "Settlement" in the Unified Patents PTAB Data. The specific terms of the settlement are confidential.
• Appeal: Not applicable, as no Final Written Decision was issued.
• Defensive value: This proceeding indicates that a challenge was brought against the patent, but it was resolved via settlement rather than a PTAB decision on the merits. This means the patent owner, MES, Inc., avoided a final ruling on the validity of its claims. For a new defendant, the claims remain legally "untested" by a PTAB final decision. However, the fact of a settlement could suggest either a perceived weakness in the patent or a strategic business decision by the petitioner.

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Strategic summary

As of today, July 1, 2026, all claims of US patent 10926218 remain UNTESTED by a Final Written Decision from the PTAB. No claims have been formally canceled or sustained by the Board. The single IPR filed, IPR2025-00717, was terminated due to a settlement between the petitioner, PacifiCorp et al., and the patent owner, MES, Inc.

Regarding the estoppel landscape, since IPR2025-00717 concluded in a settlement and not a Final Written Decision, statutory estoppel under 35 U.S.C. § 315(e)(2) against PacifiCorp et al. for grounds raised or reasonably could have raised is not typically triggered in the same way as with a FWD. However, the settlement agreement itself would likely include specific clauses regarding future challenges to the patent by PacifiCorp et al. or its privies. For any other potential defendant currently being asserted against, all prior-art grounds remain theoretically available for a new IPR petition, as the patent has not been subjected to a full PTAB validity review.

There are no apparent pattern signals such as multiple IPRs filed by the same petitioner, aggressive PTAB appeals by the patent owner, or involvement of a defensive aggregator like Unified Patents beyond their listing of the case. The settlement suggests a negotiated outcome rather than a litigated one at the PTAB.

Recommended next steps

• Given that IPR2025-00717 concluded in a settlement and not a Final Written Decision, the validity of the patent's claims has not been adjudicated by the PTAB. Therefore, there is no FWD to link to or quote for claim invalidation.
• The absence of an active proceeding means there are no trial-stage milestones (institution decision deadline, oral hearing, FWD due date) to monitor.
• For a defendant, the absence of an adverse FWD means the patent has not been weakened by PTAB invalidity findings. However, the settlement of a prior IPR might suggest some underlying challenges to the patent's claims that led to the agreement. A thorough prior art search would be advisable to identify potential grounds for a new IPR, as the claims remain effectively untested by the PTAB.

Citations:
https://portal.unifiedpatents.com/ptab/case/IPR2025-00717