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. 14, 2023
Filed:
Aug. 04, 2020
Applicant:
Zhangzhou Pien Tze Huang Pharmaceutical Co., Ltd., Fujian, CN;
Inventors:
Juan Yu, Zhangzhou, CN;
Fei Hong, Zhangzhou, CN;
Tingting Yin, Zhangzhou, CN;
Zhiliang Chen, Zhangzhou, CN;
Yichao Zhuang, 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 401/14 (2006.01);
U.S. Cl.
CPC ...
C07D 401/14 (2013.01); C07B 2200/13 (2013.01);
Abstract
Provided are crystalline forms of pyrazine-2(1H)-ketone compound and a preparation method thereof; specifically disclosed are a method for preparing the compound of formula (II) and crystalline forms thereof.