Short Summary
Zhuhai CosMX Battery challenges Ningde Amperex Technology’s battery electrolyte patent in IPR2025‑00405. The petitioner argues the Board correctly instituted the IPR and that the Patent Owner’s request for discretionary denial should be denied. Prior art references disclose the claimed electrolyte components.
Detailed Summary
In IPR2025‑00405, Zhuhai CosMX Battery Co., Ltd. contests U.S. Patent No. 11,769,910 owned by Ningde Amperex Technology Ltd., which claims lithium‑ion battery electrolytes containing fluoroethylene carbonate and propanesultone. The petitioner’s authorized response asserts that the Patent Trial and Appeal Board properly instituted the IPR, finding a reasonable likelihood of prevailing on the majority of the 21 challenged claims (1‑6 and 12‑26). The response also rebuts the Patent Owner’s arguments that challenges to claims 20‑26 were forfeited and that the Director should overturn a prior discretionary denial, emphasizing that no new circumstances exist. The petition relies on multiple foreign patent publications (Zeng, Zhou, etc.) to show disclosure of the claimed elements.
Practitioner Note
This case demonstrates the evidentiary and procedural standards applied in patent matters before local courts. Understanding the court's reasoning in Zhuhai CosMX Battery Co., Ltd. vs Ningde Amperex Technology Ltd. is valuable context for structuring arguments or assessing risk in similar proceedings.
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