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Expired Canadian patentCanada

Isoindoline compounds and the manufacture and use thereof

CA 1184179 A · Owner: Ciba-Geigy Investments Ltd. · Inventors: Iqbal, Abul; Lienhard, Paul

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Abstract From the Canadian patent

The invention relates to a process for the manufacture of 1:1 metal complexes of isoindoline azines of the formula (1), wherein the ring A is unsubstituted or is substituted by two to four halogen atoms, by one or two alkyl or alkoxy groups of 1 to 4 carbon atoms, by a phenyl, phenoxy, nitro or benzoylamino group or by an, alkanoylamino group of 2 to 6 carbon atoms R is a hydrogen, atom, an alkyl or aryl group and Q is a group of the formula, (2), wherein B is an isocyclic or heterocyclic radical from the group consisting of phenylene, naphthylene, a 5- or 6-membered heterocyclic ring which may be fused with a benzene nuclei and which contains a nitrogen, oxygen or sulfur atom …

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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 March 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 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 11, 1981
GrantedMarch 19, 1985
Term endedMarch 19, 2002
Patent numberCA 1184179 A
Classification (IPC)C09B57/04 +2 more

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedMarch 11, 1981Patent grantedMarch 19, 1985Term endedMarch 19, 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.