ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,389,790, issued on Aug. 12, was assigned to BEIJING SUMMER SPROUT TECHNOLOGY Co. LTD (Beijing).
"Organic electroluminescent material and device" was invented by Tao Wang (Beijing), Chi Yuen Raymond Kwong (Beijing) and Chuanjun Xia (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is an organic electroluminescent material and device. The organic electroluminescent material is a novel metal complex that comprises a ligand having a fluorene structure and a ligand having a dibenzofuran, dibenzothiophene, or dibenzoselenophene structure, and has a general formula of M(La)m(Lb)n(Lc)q, where the ligand La has a structure represented by Formula ...