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:
Jul. 10, 2012
Filed:
Dec. 11, 2007
Applicants:
Gwan Sun Lee, Seoul, KR;
Young-kil Chang, Seoul, KR;
Jaeheon Lee, Yongin-si, KR;
Chul Hyun Park, Seongnam-si, KR;
Eun-ju Park, Seoul, KR;
Jaeho Yoo, Seoul, KR;
Inventors:
Gwan Sun Lee, Seoul, KR;
Young-Kil Chang, Seoul, KR;
Jaeheon Lee, Yongin-si, KR;
Chul Hyun Park, Seongnam-si, KR;
Eun-Ju Park, Seoul, KR;
Jaeho Yoo, Seoul, KR;
Assignee:
Hanmi Holdings Co., Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 215/00 (2006.01); C07D 215/18 (2006.01); C07F 9/09 (2006.01); C07F 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method for preparing montelukast, an inhibitor against leukotrienes, and an intermediate used therein. According to the inventive method, high-purity montelukast or its sodium salt can be prepared in a high yield.