Patents Examined by Ernesto Valle
  • Crystal form of pyridopyrimidine derivative and preparation method thereof
    Patent number: 12269823
    Abstract: 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 compound of formula (I) and a preparation method thereof. The new crystal form has good physical and chemical properties, thereby facilitating clinical treatments.
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: April 8, 2025
    Assignees: Jiangsu Hengrui Medicine Co., Ltd., Shanghai Hengrui Pharmaceutical Co., Ltd.
    Inventors: Qi Wu, Zhenxing Du, Jie Wang, Lin Wang, Weidong Lu, Qiyun Shao, Jun Feng, Feng He