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Expired Canadian patentCanada

Benzylaminoaryl-dihydropyridinelactones, process for their preparation, and their use in medicaments

CA 1304375 C · Owner: Hebisch, Siegbert · Inventors: Bechem, Martin; Kayser, Michael; Hebisch, Siegbert

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Abstract From the Canadian patent

Benzylaminoryl-dihydropyridinelactones process, for their preparation, and their use in medicaments ABSTRACT OF THE DISCLOSURE, A benzylaminoaryl-dihydropyridinelactone compound of the formula (I), (I), in which R1 represents hydrogen, halogen, cyano nitro, C6-C12-aryl, C1-C8-alkyl, C1-C8-alkoxy C1-, C6-alkylthio, trifluoromethyl, trifluoromethoxy trifluoromethylthio, difluoromethoxy, di-C1-C5alkylamino, C1-C6-alkoxycarbonyl or C1-C6-alkylsulphonyl, R2 represents hydrogen, or, represents a straight-chain branched or cyclic, saturated or unsaturated hydrocarbon radical having up to 10 carbon atoms which is optionally substituted by C1-C6-alkoxy, C1-C6-alkylthio C1-C6-alkylsulphonyl, halogen, …

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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 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 24, 1988
GrantedJune 30, 1992
Term endedJune 30, 2009
Patent numberCA 1304375 C
Classification (IPC)C07D491/04 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedFeb 24, 1988Patent grantedJune 30, 1992Term endedJune 30, 2009

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