Process for the preparation of coated finely divided inorganic solids and their use
CA 2480959 C · Owner: Amirzadeh-Asl, Djamschid · Inventors: Amirzadeh-Asl, Djamschid
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of coated finely divided inorganic solids is described in which the surface of finely divided inorganic solids particles is coated with at least two different organic additives at least one additive comprising a wetting agent dispersing agent or deflocculating agent and the proportion of additives being not more than 15 wt.% of the coated solids.
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
- Filed September 8, 2004 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2026.
- 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.