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:
Sep. 01, 1998
Filed:
Jul. 18, 1997
Applicant:
Inventors:
Gary M Lim, Onondaga, NY (US);
John M Roubie, Onondaga, NY (US);
Vicki H Audia, Plainsboro, NJ (US);
Assignee:
Bristol-Myers Squibb Company, Princeton, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540230 ;
Abstract
The cephalosporin intermediates, desacetyl 7-glutaryl ACA and desacetyl cephalosporin D, are obtained in the form of a concentrated aqueous solution from an aqueous solution containing said intermediates in less concentrated form by solvent extraction using cyclohexanone followed by back-extraction into water. The concentrated aqueous solution of intermediate is in a form which can be used for economical production of 7-ACA using known procedures.