Process for making a phthalocyanine pigment dispersion
CA 1314663 C · Owner: Donegan, Thomas Edward · Inventors: Bantjes, John Henry; Donegan, Thomas Edward; Leary, Timothy Gerard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A process for making an aqueous pigment dispersion comprising substantially 100 percent .beta.-phase isometric, copper phthalocyanine pigment particles is carried out by activating a pigment crude, followed by fine-milling the activated crude in the presence of an emulsion the fine-, milling taking place in a stirring mill. The resulting pigment slurry is then isolated as an aqueous presscake. - 22 -
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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 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2010.
- 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.