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. 22, 2019
Filed:
Nov. 24, 2016
Chia Tai Tianqing Pharmaceutical Group Co., Ltd., Lianyungang, CN;
Centaurus Biopharma Co., Ltd., Beijing, CN;
Yan Peng, Lianyungang, CN;
Fei Liu, Lianyungang, CN;
Zhilin Chen, Lianyungang, CN;
Yayu Zhang, Lianyungang, CN;
Zhongyuan Hu, Lianyungang, CN;
Jinfeng Jiang, Lianyungang, CN;
Abstract
The present invention belongs to the field of drug crystals, relates to crystals of thiadiazole derivative DPP-IV inhibitors, and in particular relates to A and B type crystals of the compound as shown in formula 7. The crystals of the present invention have excellent stability. For example, under high temperature, high humidity or light test conditions, the material contents associated with the crystal of the compound of formula 7 do not change significantly. In addition, the crystal of the present invention also has a very good powder flowability and satisfies the requirements of drug preparation and production.