ALEXANDRIA, Va., April 21 -- United States Patent no. 12,610,736, issued on April 21, was assigned to LG Chem Ltd. (Seoul, South Korea).
"Organic light emitting device" was invented by Jiwon Kwak (Daejeon, South Korea), Sung Kil Hong (Daejeon, South Korea) and Yongbum Cha (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present specification relates to an organic light emitting device including an anode, a first organic material layer including a compound of Chemical Formula 1, a second organic material layer including a compound of Chemical Formula 2, a light emitting layer and a cathode:wherein all the variables are described herein."
The patent was filed on May 26, 2017, under App...