US Patent Issued to Universal Display on Feb. 3 for "Organic electroluminescent materials and devices" (Pennsylvania, New Jersey Inventors)

ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,543,492, issued on Feb. 3, was assigned to Universal Display Corp. (Ewing, N.J.).

"Organic electroluminescent materials and devices" was invented by Zhiqiang Ji (Chalfont, Pa.), Pierre-Luc T. Boudreault (Pennington, N.J.), Tongxiang Lu (Lawrenceville, N.J.), Wei-Chun Shih (Lawrenceville, N.J.), Bert Alleyne (Newtown, Pa.) and Hsiao-Fan Chen (Lawrence Township, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A compound having a ligand LA of Formula I,is disclosed. In Formula I, ring B is a 5-membered or 6-membered ring; K is a direct bond, O, or S; X is O, S, Se, NR, CRR', SiRR', or GeRR'; R1 and R2 are each independently selected from a variety of su...