Derivatives of pyridinium thiomethyl cephalosporins, process for preparing them and pharmaceutical compositions containing them
CA 1201432 A · Owner: Sanofi · Inventors: Labeeuw, Bernard; Salhi, Ali
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PATENT APPLICATION, entitled: New derivatives of pyridinium thiomethyl cephalosporins process for preparing them and pharmaceutical compositions containing them, in the names of: Bernard LABEEUW Ali SALHI, assigned to: SANOFI, ABSTRACT OF THE DISCLOSURE The present invention relates to cephalosporins of general formula:, in which:, - R1 is H or CH3, R2 is CH3 or R1 and R2 form a 1,3-propylene group - R3 is lower alkyl, alkenyl, alkynyl or CH2COO alkyl - R4 is H or OH, the S being bonded to the pyridine ring in 2 or 4 position, -A is H or cation or ester or hemiacetal which is easily hydrolysable - and X is a derivative of a mineral or organic acid. The invention also relates to a process …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 4, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 4, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.