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. 26, 2004
Filed:
May. 01, 2002
Applicant:
Inventors:
Kwee-Hyun Suh, Incheon-si, KR;
Mi-Ra Seong, Yongin-si, KR;
Nam-Du Kim, Osan-si, KR;
Gwan-Sun Lee, Seoul, KR;
Assignee:
Hanmi Pahrm. Co., Ltd., Kyungki-Do, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07H 1/708 ;
U.S. Cl.
CPC ...
C07H 1/708 ;
Abstract
Clarithromycin can be easily prepared by reacting erythromycin A N-oxide with a methylating agent to obtain 6-O-methylerythromycin A N-oxide; and treating 6-O-methylerythromycin A N-oxide obtained above with a reducing agent in a high yield.