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. 19, 1993
Filed:
Jun. 28, 1991
Applicant:
Inventors:
robert H Bradbury, Wilmslow, GB;
Frederic H Jung, Rilly la Montagne, FR;
Jean J Lohmann, Hermonville, FR;
Peter R Marsham, Poynton, GB;
Georges Pasquet, Bazancourt, FR;
Assignees:
Imperial Chemical Industries PLC, London, GB;
ICI Pharma, Cergy, Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540221 ; 540222 ; 540225 ;
Abstract
A cephalosporin derivative of the formula I: ##STR1## in which X is S, O, CH.sub.2 or SO, ##STR2## represents one of C-7 acyl groups known in the cephalosporin art, R3 is hydrogen or methoxy, R4 is hydrogen, optionally substituted alkyl or allyl, and R5 is an aromatic heterocyclic ring system which is linked via carbon, and which contains a quaternized nitrogen atom.