Polypore Receives Favorable Ruling On Preliminary Injunction Against LG Chem, Ltd.

Polypore International, Inc. PPO, announced today that the United States District Court for the Western District of North Carolina has granted a motion by Celgard, LLC ("Celgard"), a subsidiary of Polypore International, Inc., for a preliminary injunction against LG Chem, Ltd. and LG Chem America, Inc. (collectively "LG"). The judge's order granting the injunction is currently under seal; portions of the order may be released in the future at the court's discretion. Celgard had requested a preliminary injunction to prohibit the importation, sale or offer for sale in the United States and inducement of others to use, sell or offer for sale lithium-ion batteries, including batteries used in electric drive vehicles and consumer electronics, which contain LG's ceramic coated lithium-ion battery separator, until a full trial on the matter is concluded. The lawsuit and motion for injunction are based on Celgard's assertion that LG infringes Celgard's patent (United States Patent No. 6,432,586), which claims ceramic composite layer lithium-ion battery separators first developed by Celgard for high-energy rechargeable lithium-ion batteries.