ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,501, issued on Feb. 24, was assigned to LG Chem Ltd. (Seoul, South Korea).

"Compound and organic light emitting device comprising the same" was invented by Shin Sung Kim (Daejeon, South Korea), Jaechol Lee (Daejeon, South Korea), Yongwook Kim (Daejeon, South Korea), Young Kwang Kim (Daejeon, South Korea), Byeong Yun Lim (Daejeon, South Korea), Beomshin Cho (Daejeon, South Korea) and Hyunju Choi (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a novel compound of Chemical Formula 1 and an organic light emitting device including the same: X1, X2, A4, A5, Ar1, Ar2, and R1 to R4 are described herein."...