Copper phthalocyanine derivatives
CA 1088054 A · Owner: Ciba-Geigy Ag · Inventors: Blackburn, John B.; Irvine, Alexander M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Copper phthalocyanine derivatives of the formula or mixtures thereof wherein CuPc is copper phthalocyanine X is hydrogen, halogen, or alkyl or alkoxy containing 1 to 4 carbon atoms, n is a value from 1 to 4 and R is linear or branched, alkyl of 1 to 22 C-atoms which may be substituted with one or more alkoxy, dialkylamino or alkylthio, the alkyls having 1 to 22 C-atoms, or arylalkyl, the alkyl having 1 to 4 C-atoms and the aryl being optionally substituted by one or more nonwater solubilising groups, which, when incorporated into a phthalocyanine pigment, provide excellent flocculation resistance in paint and printing ink media.
Read the whole patent
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 21, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 21, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.