ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,398,164, issued on Aug. 26, was assigned to Universal Display Corp. (Ewing, N.J.).
"Organic electroluminescent materials and devices" was invented by Zhiqiang Ji (Chalfont, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A compound including a bidentate ligand LA that includes a moiety of Formula I,is described. In Formula I, ligand LA is coordinated to a metal M by two bonds, and (i) both bonds are with Formula I, and if the metal M is coordinated by a direct bond to a nitrogen of ring C or ring D, then at least one of ring A, ring B, ring C, and ring D is not a benzene ring; or (ii) one of the two bonds is with Formula I, and the other bond is with...