Treatment of pigment
CA 1050210 A · Owner: Tioxide Group Limited · Inventors: Howard, Peter B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a process for the treatment of titanium dioxide pigment in such a manner that there becomes associated with the pigment a number of hydrous metal oxides or a phosphate so that the pigment, when incorporated in a paint, has a reduced photochemical activity. An aqueous dispersion of titanium dioxide is formed and contains as a dispersant 0.1% to 0.3% by weight of monoisopropanolamine a water-soluble phosphate in an amount of from 0.05% to 0.5% by weight expressed as P2O5 or a mixture thereof or a water-, soluble silicate in an amount of 0.1% to 0.5% by weight expressed as SiO2 used alone or together with the monoisopropanolamine or the phosphate or a mixture thereof. The …
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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 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 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.