ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,317, issued on Nov. 18, was assigned to Universal Display Corp. (Ewing, N.J.).
"Organic electroluminescent materials and devices" was invented by Zhiqiang Ji (Chalfont, Pa.), Derek Ian Wozniak (Bensalem, Pa.), Wei-Chun Shih (Lawrenceville, N.J.), Ting-Chih Wang (Lawrenceville, N.J.), Pierre-Luc T. Boudreault (Pennington, N.J.) and James Fiordeliso (Yardley, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a compound including a first ligand LA of Formula IIn Formula I, ring C is a 5- or 6-membered ring; each of X1 to X8 is C or N; one of X1 to X4 is C and is connected to ring C, and one of X1 to X4 is N and is coordinated to a metal M;...