ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,479,950, issued on Nov. 25, was assigned to LG Chem Ltd. (Seoul, South Korea).

"Anionic polymerization initiator, anionic polymerization initiator composition, and production method therefor" was invented by Hyun Mo Lee (Daejeon, South Korea), Seok Pil Sa (Daejeon, South Korea), Eun Ji Shin (Daejeon, South Korea), Ki Soo Lee (Daejeon, South Korea), Bun Yeoul Lee (Gyeonggi-do, South Korea) and Tae Jin Kim (Chungcheongnam-do, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to an anionic polymerization initiator represented by Formula 1 below for producing a polyolefin-polystyrene block copolymer, an anionic polymer...