METHOD OF MAKING ".beta."-ALUMINA
CA 1267769 C · Owner: Duncan, James Hugh · Inventors: Barrow, Peter; Van Zyl, Arnold; Kingon, Angus Ian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of making beta"-alumina is disclosed. The method comprises dispersing in a precursor of aluminium oxide a member of the group comprising sodium oxide and its precursors and dispersing, in the precursor of aluminium oxide a spinel stabilizer which is a member of the group comprising spinel-forming oxides and the precursors thereof, to form a mixture. The mixture is then heated to a temperature at which at least some of the precursor of aluminium oxide is converted to beta"-alumina. The precursor of aluminium oxide is one which, when calcined in air by itself has a calcination product which, when subjected to X-ray diffraction, displays a predetermined X-ray diffraction trace.
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
- Granted April 17, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 2007.
- 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.