(January 2, 2020, 9:22 AM EST) -- ALEXANDRIA, Va. — In a Dec. 24 petition for inter partes review (IPR), a chemical manufacturing company maintains that various claims of a patented compound used in electrolyte compositions for rechargeable lithium ion batteries would have been obvious to a person of skill in the art (Ascend Performance Materials Operations LLC v. Samsung SDI Co. Ltd., No. IPR 2020-00349, PTAB)....