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:
Jun. 20, 2023
Filed:
Aug. 04, 2020
Applicant:
Zhangzhou Pien Tze Huang Pharmaceutical Co., Ltd., Fujian, CN;
Inventors:
Fei Hong, Zhangzhou, CN;
Jinming Huang, Zhangzhou, CN;
Longhui Gao, Zhangzhou, CN;
Shicong Wang, Zhangzhou, CN;
Tingting Yin, Zhangzhou, CN;
Zhifei Fu, Shanghai, CN;
Miaorong Luo, Shanghai, CN;
Yang Zhang, Shanghai, CN;
Jian Li, Shanghai, CN;
Shuhui Chen, Shanghai, CN;
Assignee:
ZHANGZHOU PIEN TZE HUANG PHARMACEUTICAL CO., LTD., Fujian, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 403/14 (2006.01);
U.S. Cl.
CPC ...
C07D 403/14 (2013.01); C07B 2200/13 (2013.01);
Abstract
A crystal form of a pyrazin-2(1H)-one compound and a preparation method therefor. The present invention specifically related to a compound of formula (II) and a preparation method for a crystal form of the compound.