Process for preparing fine particles of metal oxides
CA 1290136 C · Owner: Montedison S.P.A. · Inventors: Albizzati, Enrico; Mello Ceresa, Emiliano; Zaninetta, Luciano
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing spheroidal particles of metal oxides, of average diameter smaller than 3 microns characterized, in that an emulsion is prepared of a hydrolyzable liquid metal compound in: a perfluoropolyether, and the emulsion is reacted with water, water vapor, or with a mixture in any ratio, of, water with a liquid miscible or immiscible with it which does, not interfere with the reaction of the metal compound with water with the formation of a metal oxide hydrate which is separated. The metal oxide hydrate is subsequently dried and calcined to the oxide.
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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 October 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2008.
- 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.