Production of coated inorganic magnetic particles
CA 1340151 C · Owner: Anagen Limited · Inventors: Burrell, Robert E.; Sang, Jean V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing solid ceramic particles completely coated with a coating metal oxide different from metal oxides in the ceramic are disclosed. The coated ceramic particles have a diameter less than approximately 5 microns. The process for preparing such particles comprises:, i) forming an emulsion of an aqueous solution of salts of metal ions of the ceramic in a non-miscible liquid to provide aqueous particles; ii) reacting the emulsion with NH3(g) to precipitate the ceramic particles;, iii) separating out from the reaction mixture the precipitate. In the course of this process the ceramic particles are, coated by:, iv) a) introducing a colloid of fine particles of precursors of the …
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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
- Granted December 1, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 2015.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.