Process of manufacturing co-ground calcium carbonate with ceria-containing zirconium oxide beads
CA 2880965 C · Owner: Omya International Ag · Inventors: Rainer, Christian; Pohl, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention described includes a process of making co-ground calcium carbonate that , includes ground and precipitated calcium carbonate (GCC and PCC). The process includes , providing an aqueous suspension of GCC co-grinding the GCC suspension with a suspension of PCC, optionally screening and up concentrating optionally , drying, and , conducting the co-grinding with ceria-containing zirconium oxides beads having certain size , and ceria content properties to provide advantageous production of the coground material.
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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 September 12, 2006 and granted July 11, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 12, 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.