Fluid pigment suspensions with phosphonocarboxylic acids
CA 1114713 A · Owner: Bayer Aktiengesellschaft · Inventors: Lailach, Gunter; Teichmann, Gunther; Linde, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an aqueous fluid dispersible filler or pigment suspension containing an inorganic dispersion aid the improvement which, comprises employing as the dispersion aid about 0.01 to 1% by weight, based on solids, of a phosphonocarboxylic acid or a salt thereof. The pigment may be TiO2 and be present in from 30 to 80% concentration. The dispersion aid may be phosphonobutanc-1 2,4-tricarboxylic acid or a salt, and an amine or alkanolamine may also be present.
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 December 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 1998.
- 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.