ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,384,799, issued on Aug. 12, was assigned to Canon K.K. (Tokyo).
"Organic compound and organic light-emitting device" was invented by Naoki Yamada (Tokyo), Jun Kamatani (Tokyo), Yosuke Nishide (Kanagawa, Japan), Hirokazu Miyashita (Kanagawa, Japan) and Satoru Shiobara (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An organic compound, represented by formula [1] or [2], suitably used for a thermally activated delayed fluorescent device: where X1 to X18 and X21 to X38 are each independently selected from the group consisting of a hydrogen atom, and substituents, Y is oxygen, sulfur, selenium, tellurium, a CR1R2 group, or a carbonyl group, ...