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Celgard successfully sues firm over lithium-ion separator trade secrets

Fri, 09/20/2019 - 11:38 -- Paul Crompton

US battery separator firm Celgard, a subsidiary of Polypore International, has successfully sued Canadian company Targray International on infringement of two patents on its lithium-ion separator portfolio.

The case— heard in California, US— involved Celgard’s ceramic coated battery separator patent (US Patent 6,432,586, now U.S. Patent RE47,520) and Celgard’s polypropylene separator patent (U.S. Patent 6,692,867).

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