US Patent Issued to MERCK PATENT on Feb. 24 for "Aromatic heterocyclic derivative, and organic electroluminescent element, illumination device, and display device using aromatic heterocyclic derivative" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,459, issued on Feb. 24, was assigned to MERCK PATENT GMBH (Darmstadt, Germany).

"Aromatic heterocyclic derivative, and organic electroluminescent element, illumination device, and display device using aromatic heterocyclic derivative" was invented by Motoaki Sugino (Akishima, Japan) and Eisaku Katoh (Hachioji, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention addresses the problem of providing a novel aromatic heterocyclic derivative, providing an organic EL element that uses the derivative and has high luminous efficiency, long luminescence life, and few changes over time when used under high temperatures, and providing a d...