Compositions and methods for imparting improved rheology on pigment based inks and paints
CA 2483836 A1 · Owner: Fraser, Iain Frank · Inventors: Fraser, Iain Frank; Healy, Thomas; Niven, Stuart Cook
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pigment compositions comprising an organic pigment and a combination of at least two normally water-soluble coloured compounds (dyes) of opposing charge i.e. of at least one anionic and one cationic dye are provided. The compositions impart improved rheology on non-aqueous pigment based printing inks and paints.
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
- Filed April 24, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2025.
- 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.