Aqueous calcium carbonate-containing slurry
CA 2808058 C · Owner: Omya Development Ag · Inventors: Kaessberger, Michael; Buri, Matthias; Schoelkopf, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is an object of the present invention to provide a process of manufacturing calcium carbonate-containing slurries wherein said calcium carbonate- containing slurries are prepared by adding one or more zirconium compounds and possibly one or more further phosphate-free additives acting as dispersing and/or grinding aid agents. Another object of the invention lies in calcium carbonate- containing slurries thus obtained and dry calcium carbonate mineral pigments resulting from the drying of such slurries. A further object of the invention is the use of such slurries and such dry mineral pigments in paper manufacturing plastic coatings, as fillers for plastics or for aqueous paint …
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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
- Filed July 11, 2006 and granted September 29, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.