ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,582, issued on April 21, was assigned to Universal Display Corp. (Ewing, N.J.).
"Organic electroluminescent materials and devices" was invented by Jerald Feldman (Cherry Hill, N.J.) and Hsiao-Fan Chen (Lawrence Township, N.J.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a compound including a ligand LA of Formula I,In Formula I, moiety B is a monocyclic or polycyclic ring structure comprising 5- and/or 6-membered rings; Y is selected from O, S, NR, and CRR'; Z is carbon or nitrogen; each R, R', RA, and RB is independently hydrogen or a substituent; LA is coordinated to a metal M; and any two adjacent R, R', RA, and RB can be joined o...