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Expired Canadian patentCanada

Unsaturated derivatives of 7-acylamido-3-cephem-4- carboxylic acid and process for their preparation

CA 1103237 A · Owner: Farmitalia Carlo Erba S.P.A. · Inventors: Monti, Gisella; Nannini, Giuliano; Forgione, Angelo

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Abstract From the Canadian patent

This invention relates to compounds of the general formula I (I), wherein, Z is cyano or carbamoyl; A is trans -CH=CH, cis -CH=CH or -C?C-; B is -O-?-CH3 or -S-Het wherein Het is one of the following groups , wherein R is hydrogen or methyl, or wherein, R1 and R2 are independently selected from the group consisting of hydrogen and methyl;, X is a free or esterified carboxy group and pharmaceutically and veterinarily, acceptable salts thereof. These compounds possess a high antibacterial activity against both Gram-positive and Gram-negative bacteria and are therefore useful in the treatment of infections caused by said microorganisms. This invention also provides a process for the …

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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 16, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 10, 1977
GrantedJune 16, 1981
Term endedJune 16, 1998
Patent numberCA 1103237 A
Classification (IPC)C07D501/24 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedAug 10, 1977Patent grantedJune 16, 1981Term endedJune 16, 1998

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.