The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2026
Filed:
Feb. 18, 2022
Applicant:
Shenzhen Rentai Pharmatech Ltd., Shenzhen, CN;
Inventors:
Guobin Ren, Shenzhen, CN;
Weijie Ji, Shenzhen, CN;
Dongxu Yi, Shenzhen, CN;
Jiajun Huang, Shenzhen, CN;
Assignee:
Shenzhen Jingtai Technology Co., LTD., Shenzhen, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 239/62 (2006.01);
U.S. Cl.
CPC ...
C07D 239/62 (2013.01); C07B 2200/13 (2013.01);
Abstract
Disclosed is crystal form M of the proline hydroxylase inhibitor daprodustat, wherein the X-ray powder diffraction thereof, expressed in 2θ angles and using Cu-Ka radiation, has characteristic peaks at 4.7±0.2°, 6.5±0.2°, and 6.8±0.2°. Disclosed are the preparation method for and the use of crystal form M. The crystal form M has good light stability, high temperature stability and high humidity stability, good solubility, and high purity.