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:
Nov. 21, 2017
Filed:
Sep. 07, 2015
Applicant:
St Pharm Co., Ltd., Gyeonggi-do, KR;
Inventors:
Geun Jho Lim, Gyeonggi-do, KR;
Sun Ki Chang, Gyeonggi-do, KR;
Chang Ho Byeon, Gyeonggi-do, KR;
Hoe Jin Yoon, Gyeonggi-do, KR;
Moon Soo Kim, Gyeonggi-do, KR;
Assignee:
ST PHARM CO., LTD., Gyeonggi-do, KR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D 257/02 (2006.01);
U.S. Cl.
CPC ...
C07D 257/02 (2013.01);
Abstract
Disclosed is a novel method of preparing highly pure calcobutrol using an intermediate (butrol) of gadobutrol without using highly pure gadobutrol. This method is capable of obtaining calcobutrol at high purity and high yield through a simple and environmentally friendly process, and thus can be easily applied to mass production.