Pigment composition in bead form
CA 1059704 A · Owner: Ciba-Geigy Ag · Inventors: Stirling, John A.; Robertson, George H.
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 the production of a pigment composition in bead form Which comprises contacting with agitation in, the presence of an aqueous protective colloid 1 part, of a water insoluble carrier melting below 100°C. and an aqueous dispersion containing 0,25 - 2,3 parts of a pigment or Water insoluble dyestuff at a temperature above the melting point of the carrier and allowing the aqueous phase to become substantially free of pigment or water insoluble dyestuff by its association with the carrier and recovering the resulting pigmented beads which are easily dispersible in polymeric compounds to yield even colorations.
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 August 7, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 7, 1996.
- 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.