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:
Apr. 12, 2022
Filed:
Feb. 26, 2019
Applicant:
Jiangsu Hengrui Medicine Co., Ltd., Jiangsu, CN;
Inventors:
Junran Yang, Jiangsu, CN;
Lin Wang, Jiangsu, CN;
Qiyun Shao, Jiangsu, CN;
Zhenxing Du, Jiangsu, CN;
Likun Wang, Jiangsu, CN;
Assignee:
Jiangsu Hengrui Medicine Co., Ltd., Jiangsu, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 213/69 (2006.01);
U.S. Cl.
CPC ...
C07D 213/69 (2013.01); C07B 2200/13 (2013.01);
Abstract
Provided are a crystal form of an oxopicolinamide derivative and a preparation method therefor. In particular, provided are crystal forms A, B, C, D, E, and F of a compound as shown in formula (I) and a preparation method therefor. Crystal forms A, B, C, D, E, and F of the compound of formula (I) obtained in the present disclosure have good crystal stability and chemical stability, and can be better used in clinical treatment.