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:
Sep. 03, 2019
Filed:
Oct. 27, 2016
Applicant:
Guangdong Raynovent Biotech Co., Ltd., Guangdong, CN;
Inventors:
Lingyun Wu, Shanghai, CN;
Chaofeng Long, Dongguan, CN;
Peng Zhang, Shanghai, CN;
Xiaoxin Chen, Dongguan, CN;
Li Zhang, Shanghai, CN;
Zhuowei Liu, Dongguan, CN;
Zheng Wang, Shanghai, CN;
Shuhui Chen, Shanghai, CN;
Lijuan Chen, Dongguan, CN;
Assignee:
GUANGDONG RAYNOVENT BIOTECH CO., LTD., Guangdong, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 31/522 (2006.01); C07D 473/04 (2006.01);
U.S. Cl.
CPC ...
C07D 473/04 (2013.01); A61K 31/522 (2013.01); C07B 2200/13 (2013.01);
Abstract
The invention discloses a crystal form A of a compound (I) and a preparation method thereof, and further discloses an application of the crystal form A as a PDE2 or TNF-α inhibitor.