Method and apparatus for manufacturing of a calcium carbonate product, the product and its use
CA 2572776 C · Owner: Fp-Pigments Oy · Inventors: Maijala, Roope; Lax, Bjoern; Tjurin, Teuvo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for producing a calcium carbonate product formed of small < 100 nm sized separate calcium carbonate particles. Calcium hydroxide is fed through a disintegration and spraying apparatus (14) operating on the , principle of a pin mill into a gas which contains carbon dioxide for precipitating calcium carbonate particles and which is inside a precipitation reactor (10). The temperature in the precipitation reactor is maintained at < 65~C.
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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 5, 2005 and granted October 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 5, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.