US Patent Issued to Jiangsu Hengrui Medicine, Shanghai Hengrui Pharmaceutical on April 8 for "Crystal form of pyridopyrimidine derivative and preparation method thereof" (Chinese Inventors)

ALEXANDRIA, Va., April 9 -- United States Patent no. 12,269,823, issued on April 8, was assigned to Jiangsu Hengrui Medicine Co. Ltd. (Jiangsu, China) and Shanghai Hengrui Pharmaceutical Co. Ltd. (Shanghai).

"Crystal form of pyridopyrimidine derivative and preparation method thereof" was invented by Qi Wu (Jiangsu, China), Zhenxing Du (Jiangsu, China), Jie Wang (Jiangsu, China), Lin Wang (Jiangsu, China), Weidong Lu (Shanghai), Qiyun Shao (Shanghai), Jun Feng (Shanghai) and Feng He (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a crystal form of a pyridopyrimidine derivative and a preparation method thereof, and specifically relates to the crystal form of the compo...