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:
Oct. 23, 2018
Filed:
Sep. 23, 2015
Applicant:
North China Pharmaceutical New Drug R & D Co., Ltd., Shijiazhuang, Hebei, CN;
Inventors:
Shuhui Chen, Shanghai, CN;
Zhaozhong Ding, Shanghai, CN;
Gangli Gong, Shanghai, CN;
Xiaobing Yan, Shanghai, CN;
Wei Huang, Shanghai, CN;
Feng Guo, Shanghai, CN;
Baoling Duan, Shijiazhuang, CN;
Renlong Gao, Shijiazhuang, CN;
Pingfan Zhou, Shijiazhuang, CN;
Xinhua Lu, Shijiazhuang, CN;
Guimin Dong, Shijiazhuang, CN;
Assignee:
NORTH CHINA PHARMACEUTICAL NEW DRUG R&D CO., LTD., Shijiazhuang, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 498/14 (2006.01); C07D 265/32 (2006.01);
U.S. Cl.
CPC ...
C07D 498/14 (2013.01); C07D 265/32 (2013.01); C07B 2200/13 (2013.01);
Abstract
A preparation method for a high-purity benzoxazoleoxazine ketone compound, a crystal form thereof, and an intermediate compound for preparing a compound of formula (I), and a preparation method therefor.