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Expired Canadian patentCanada

Basically substituted 4-phenyl-4,5,6,7-tetrahydro- thieno2,3-cpyridines, processes for preparing them and pharmaceutical compositions containing them

CA 1197506 A · Owner: Boehringer Ingelheim International Gmbh · Inventors: Weber, Karl-Heinz; Boke-Kuhn, Karin; Bechtel, Wolf D.

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Overview

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Abstract From the Canadian patent

There are described 4-phenyl-4,5,6,7-tetrahydrothieno2,3-cpyridines of formula I and the acid addition salts thereof, processes for their preparation them and pharmaceutical compositions containing them. In the new compounds of formula (I), R1 represents an amino, acetylamino hydroxymethyl, methoxymethyl, or, , group wherein R5 and R6 which may be, the same or different, each represent a hydrogen atom alkyl group with 1 to 4 carbon atoms or R5 and R6, together with the nitrogen atom to which they are attached represent a 5-, 6- or 7-membered ring any, 6-membered ring optionally containing an oxygen atom; R2 and R3, which may be the same or different represent a hydrogen, fluorine, chlorine …

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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 December 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 4, 1983
GrantedDecember 3, 1985
Term endedDecember 3, 2002
Patent numberCA 1197506 A
Classification (IPC)C07D495/04

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedMarch 4, 1983Patent grantedDec 3, 1985Term endedDec 3, 2002

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