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, 1996
Filed:
Jun. 10, 1994
Applicant:
Inventors:
Sung K Kim, Youseong-ku, KR;
Jong C Lim, Youseong-ku, KR;
Seong N Kim, Youseong-ku, KR;
Hee M Oh, Seo-ku, KR;
Woo H Kim, Seo-ku, KR;
Assignee:
Lucky Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540222 ; 540223 ; 540225 ; 540227 ; 540228 ;
Abstract
The present invention provides a process for preparing cephem derivatives having the following general formula (I): ##STR1## in which R.sup.1 represents a carboxy group or a protected carboxy group which can form the salt of --COO.sup.- M.sup.+ with an alkali metal ion (M.sup.+) such as sodium, or may represent --COO.sup.- when R.sup.2 has a substituent having positive electric charge such as pyridinium, pyrimidinium or thiazolium,