US Patent Issued to Universal Display on June 17 for "Organic electroluminescent materials and devices" (Pennsylvania, New Jersey Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,237, issued on June 17, 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.), Wei-Chun Shih (Lawrenceville, N.J.), Walter Yeager (Yardley, Pa.) and Bert Alleyne (Newtown, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A compound including a first ligand LA of Formula I,is disclosed. In Formula I, ring B is a 5- or 6-membered ring; X1, X2, and X3 are each CRA or N; R is a 5- or 6-membered carbocyclic or heterocyclic ring, which can be further fused or substituted; and (1) when ring B is an unfused 6-membere...