ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,439,817, issued on Oct. 7, was assigned to SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIAL Co. LTD. (Hebei, China).
"Long-lifetime organic electroluminescent compound and organic electroluminescent device comprising the same" was invented by Zaihao Zheng (Hebei, China), Pengjun Bu (Hebei, China), Shiwen Yue (Hebei, China), Feng Liang (Hebei, China) and Tianyu Wei (Hebei, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a long-lifetime organic electroluminescent compound and an organic electroluminescent device comprising the same. The general structural formula of the organic electroluminescent compound is as shown in Formula I. The ...