PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US Patent 11799131. The proceeding, IPR2025-00431, was terminated due to a settlement between the parties. This means no claims were invalidated or sustained by the PTAB in a Final Written Decision. For a defendant, this indicates that the patent has not been subjected to a full PTAB validity challenge to conclusion, and its claims remain intact from a PTAB perspective.

IPR2025-00431 — Zhuhai CosMX Battery Co., Ltd. v. Ningde Amperex Technology Ltd.

• Type: Inter Partes Review
• Filed: 2025-01-28
• Status: Terminated-Settled. This proceeding concluded due to a settlement between the petitioner and the patent owner before a Final Written Decision was issued.
• Judge panel: Information regarding the judge panel for this specific proceeding is not readily available in public search results without direct access to the PTAB's E2E system.
• Petition grounds: The specific claims challenged, prior art relied upon, and statutory bases (§ 102 / § 103 / § 112) for this petition are not publicly available in summary form through general web searches for a terminated-settled case without access to the full PTAB filings.
• Institution decision: This IPR was instituted. The institution decision date was October 24, 2025. The panel's reasoning for institution would be detailed in the institution decision, which is not readily available through general public search for summary.
• Final Written Decision (if issued): No Final Written Decision was issued as the proceeding was terminated due to settlement.
• Settlement / termination: The proceeding was terminated-settled on 2026-06-26. The specific terms of the settlement are confidential between Zhuhai CosMX Battery Co., Ltd. and Ningde Amperex Technology Ltd.
• Appeal: Not applicable, as no Final Written Decision was issued to be appealed.
• Defensive value: Since this IPR was settled and not adjudicated to a Final Written Decision, none of the patent's claims were formally invalidated by the PTAB. This means a defendant facing assertion of this patent cannot point to a PTAB decision cancelling claims. However, the fact that an IPR was instituted and subsequently settled might suggest the petitioner believed there were viable grounds for invalidity, and the patent owner chose to settle rather than risk an adverse decision.

Strategic summary

Currently, none of the claims of US11799131 have been formally canceled by the PTAB. The single IPR filed, IPR2025-00431, was instituted but ultimately terminated due to a settlement between the petitioner (Zhuhai CosMX Battery Co., Ltd.) and the patent owner (Ningde Amperex Technology Ltd.). This means all claims of US11799131 remain UNTESTED by a PTAB Final Written Decision.

The estoppel landscape under § 315(e)(2) will apply to Zhuhai CosMX Battery Co., Ltd. and its privies, barring them from raising any grounds they raised or reasonably could have raised in IPR2025-00431 against the sustained claims (though no claims were sustained in a FWD, the settlement likely has its own estoppel implications, which are confidential). For a new defendant currently being asserted against, all prior-art grounds remain theoretically available in a new IPR petition, as they are not subject to estoppel from IPR2025-00431 unless they are in privity with Zhuhai CosMX Battery Co., Ltd. There are no clear patterns of multiple IPRs by the same petitioner or aggressive PTAB appeals by the patent owner at this time. Unified Patents is listed as a petitioner in another, non-instituted IPR on this patent (IPR2025-00722, which is not part of the canonical list provided for this task but is visible in the Google Patents data, and is listed as "Not Instituted - Procedural").

Recommended next steps

Since IPR2025-00431 was terminated-settled and did not result in a Final Written Decision, there is no public FWD to link to for claim invalidation. If you are a defendant, you should investigate the basis for the IPR petition IPR2025-00431 to understand the prior art and arguments Zhuhai CosMX Battery Co., Ltd. found compelling enough to file. This information would likely be found in the publicly available petition itself on the USPTO PTAB E2E system. You may wish to consider filing your own IPR petition if you identify strong prior art grounds.

Further, while not part of the canonical list for this task, the Google Patents information shows IPR2025-00722 was filed by an unnamed petitioner (Unified Patents, as indicated in the Google Patents data) and has a status of "Not Instituted - Procedural". Reviewing the petition and institution decision for this proceeding could also provide valuable insights into potentially weak areas of the patent or arguments that failed to convince the PTAB for institution.

The absence of any PTAB decision on the merits means the patent's claims have not been challenged to conclusion. This could present both an opportunity (if strong prior art exists that hasn't been fully litigated) and a risk (as there are no definitive PTAB rulings to guide a defense).

Citations:
https://portal.unifiedpatents.com/ptab/case/IPR2025-00431
https://patents.google.com/patent/US11799131/en