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Expired Canadian patentCanada

Anthraquinoylcarboxylic acid hydrazides, curable compositions and use thereof

CA 1283410 C · Owner: Fischer, Walter · Inventors: Fischer, Walter; Ramanathan, Visvanathan; Duthaler, Rudolf

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Abstract From the Canadian patent

Anthraquinoylcarboxylic acid hydrazides curable compositions and, use thereof, Abstract of the Disclosure Anthraquinones of formula I, (I), wherein X is the group -CR2R3-, where R2 is H, -CN or C1-C5-alkyl and R3 is H or -CN, R1 is H or C1-C5-alkyl and R is a direct bond or linear or branched C1-C18-alkylene which, alone or together with the -CR2R3- group, can be interrupted by one or more -O- when R2 and/or R3 are not -CN, and curable compositions comprising a) an epoxy resin, b) a hardener if necessary, c) an anthraquinone of formula I and d) an amino alcohol. The cured compositions are photosensitive and are suitable for the preparation of coatings and metallic images by electroless …

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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 April 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 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 29, 1988
GrantedApril 23, 1991
Term endedApril 23, 2008
Patent numberCA 1283410 C
Classification (IPC)C07C243/32 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedJune 29, 1988Patent grantedApril 23, 1991Term endedApril 23, 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.