US Patent Issued to Sumitomo Chemical on March 11 for "Light emitting device and production method thereof, and composition for light emitting device and production method thereof" (Japanese Inventors)

ALEXANDRIA, Va., March 12 -- United States Patent no. 12,250,870, issued on March 11, was assigned to Sumitomo Chemical Co. Ltd. (Tokyo).

"Light emitting device and production method thereof, and composition for light emitting device and production method thereof" was invented by Toshiaki Sasada (Tsukuba, Japan) and Ryuji Matsumoto (Nomi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light emitting device including an anode, a cathode, and an organic layer disposed between the anode and the cathode and containing a composition is provided. The composition contains two or more compounds (B) having a condensed hetero ring skeleton (b) containing a boron atom and a nitrogen atom in the ring. Compound (...