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Expired Canadian patentCanada

2-substituted 5-hydroxy-1h-imidazole-4-carboxamide derivatives and their preparation and use

CA 1110623 A · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Tarumi, Yuzo; Atsumi, Toshio; Yoshida, Noboru

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Abstract From the Canadian patent

Compounds of the formula (I), wherein R is C2 - C17 alkyl group C3 - C7 cycloalkyl, group, 1-adamantyl group pyridyl group, pyridine N-oxide, diphenylmethyl group benzyl group which may or may not, be substituted with nitro group halogen atom, C1 - C3, alkyl group or C1 - C3 alkoxy group or phenyl group, which may or may not be substituted with nitro group halogen atom, hydroxy group, C1 - C3 alkyl group C1 - C3, alkoxy group, carboxy group, C2 - C4 alkoxycarbonyl group phenoxycarbonyl group, carbamoyl group N-phenylcarbamoyl, group, N-adamantylcarbamoyl group benzoylamino group, trifluoromethyl group C2 - C4 alkanoyloxy group, 1-adamantoyloxy group or benzoyloxy group and salts thereof …

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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 October 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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.
FiledSeptember 5, 1978
GrantedOctober 13, 1981
Term endedOctober 13, 1998
Patent numberCA 1110623 A
Classification (IPC)C07D401/04 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedSep 5, 1978Patent grantedOct 13, 1981Term endedOct 13, 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.