.alpha.-AMINO- (P-ACYLOXYPHENYL) ACETAMIDOCEPHALOSPORANIC ACID DERIVATIVES
CA 1056813 A · Owner: Bristol-Myers Squibb Company · Inventors: Bouzard, Daniel; Weber, Abraham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This specification discloses certain novel .alpha.-amino- or .alpha.formyl-.alpha.-(p-acyloxyphenyl)acetamidocephalosporanic acids which are useful as antibacterial agents and methods of making, them. The novel cephalosporin derivatives of this invention comprise the D-(-) compounds of the formula I, wherein Y is hydrogen or S-Het, in which Het represents a 5 or 6 membered heterocyclic ring containing 1 to 4 atoms selected from N, O or S, said heterocyclic ring being optionally substituted by C1-C4 alkyl which may be optionally substituted by a carboxylic acid group or hydroxy, or alkoxyalkyl of up to 4 carbon atoms; R is hydrogen, C1-C10 alkyl optionally substituted by carboxylic acid, or …
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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 June 19, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.