ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,046, issued on June 2, was assigned to Hodogaya Chemical Co. Ltd. (Tokyo) and SFC Co. Ltd. (Cheongju-si, South Korea).
"Organic electroluminescent device" was invented by Kazuyuki Suruga (Tokyo), Kouki Kase (Tokyo), Takeshi Yamamoto (Tokyo), Shuichi Hayashi (Tokyo), Soon-wook Cha (Cheongju-si, South Korea), Sung-hoon Joo (Cheongju-si, South Korea), Byung-sun Yang (Cheongju-si, South Korea) and Ji-Hwan Kim (Cheongju-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present inventors have focused the fact that an arylamine material having a specific structure is excellent in hole injection/transport ability, thin film stability and dur...