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Expired Canadian patentCanada

Spermicidal vaginal composition comprising 1,2-benzisothiazole derivatives

CA 1060345 A · Owner: Prephar Prospection De Recherches Pharmaceutiques S.A. · Inventors: Butti, Adriano; Gazzani, Giovanni

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Abstract From the Canadian patent

SPERMICIDAL VAGINAL COMPOSITIONS COMPRISING 1,2-BENZISOTHIAZOLE DERIVATIVES", Abstract Or the disclosure A spermicidal vaginal composition comprises a spermicidal-effective amount of a 1,2-benzisothiazole derivative having the general formula (I), wherein: X is either O or S;, y is H; NO2; an halogen atom or an alkyl radical having from 1 to 4 carbon atoms; and, R is H; a straight or branched alkyl or alkenyl radical having from 1 to 6 carbon atoms, optionally substituted by one or more hydroxyl, tertiary amino and alkoxyl groups; a cycloaliphatic radical having from 3 to 8 carbon atoms; an alkyl radical optionally substituted by halogen atoms alkyl or alkoxyl radicals; an aralkyl radical …

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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 August 14, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 14, 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.
Filed—
GrantedAugust 14, 1979
Term endedAugust 14, 1996
Patent numberCA 1060345 A
Classification (IPC)A61K31/42

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedAug 14, 1979Term endedAug 14, 1996

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