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Expired Canadian patentCanada

1-phenyl-3-azabicyclo3.1.1heptane-2,4 diones, the use thereof, pharmaceutical preparations that contain these compounds, and processes for the manufacture of these compounds

CA 1280418 C · Owner: Ciba-Geigy Ag · Inventors: Bellus, Daniel; Stanek, Jaroslav; Alder, Alex

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Abstract From the Canadian patent

Substituted l-phenyl-3-azabicyclo3.1.1heptane-2,4 diones, the use thereof, pharmaceutical preparations that contain these compounds, and processes for the manufacture of these compounds, Abstract l-phenyl-3-azabicyclo3.1.1-heptane-2,4-diones of the formula, (I), in which R1 represents hydrogen or a saturated or unsaturated, aliphatic, cycloaliphatic cycloaliphatic-, aliphatic, aromatic or aromatic-aliphatic hydrocarbon radical having up to and including 18, preferably up to and including 12, carbon atoms, R2 represents hydrogen, lower alkyl, sulpho or acyl, R3 represents hydrogen or lower alkyl and R4 represents hydrogen lower alkyl, phenyl or phenyl substituted by -N(R2)(R3), and salts of …

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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 February 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 18, 1985
GrantedFebruary 19, 1991
Term endedFebruary 19, 2008
Patent numberCA 1280418 C
Classification (IPC)C07D221/22 +1 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedJune 18, 1985Patent grantedFeb 19, 1991Term endedFeb 19, 2008

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