The complaint alleges that MTI has infringed Celgard’s United States Patent No. 6,432,586 issued for an invention entitled “Separator for a High Energy Rechargeable Lithium Battery.” The patent in the lawsuit covers ceramic composite layer lithium-ion battery separators first developed by Celgard for high-energy rechargeable lithium-ion batteries. The lawsuit seeks an injunction preventing MTI from selling ceramic coated battery separators that infringe Celgard’s patent and it also seeks compensation for damages.
A separate complaint filed by Celgard in U.S. District Court for the Western District of North Carolina against MTI seeks an injunction preventing MTI from infringing trademarks and from selling unauthorized and counterfeit ceramic coated battery separators with the Celgard® registered brand name and Celgard® labeling, and also seeks compensation for damages.
Celgard is taking these actions to safeguard its assets and customers, and will continue to take appropriate steps to prevent the unfair exploitation of its intellectual property.
About Celgard and Polypore
Celgard specializes in coated and uncoated dry-process microporous membranes used as separators that are a major component of lithium-ion batteries. Celgard’s battery separator technology is important to the performance of lithium-ion batteries for electric drive vehicles, energy storage systems and other applications.
Celgard, LLC is a wholly-owned subsidiary of Polypore International, LP, an Asahi Kasei Company.
Polypore is a global company with facilities in nine countries specializing in microporous membranes used in electric and nonelectric vehicles, energy storage systems and specialty applications. Visit www.celgard.com and www.polypore.com.
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