Continuous reflux refining of metals
CA 1048790 A · Owner: Commonwealth Scientific And Industrial Research Organization · Inventors: Walters, Graeme W.; Esdaile, James D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus are described for the continuous refining of an impure metal. The invention comprises providing a column consisting of a slurry of metal crystals in liquid metal, the column having a relatively cool zone and a relatively hot zone and a continuous temperature gradient between said zones. The temperature of the cool zone is such as to permit coexistence of liquid and crystalline metal, and the hot zone is at a temperature sufficient to melt the crystals. A portion of the column in the cool zone is chilled to form a coherent mass of crystals of the metal and then incipient melting in the mass is allowed to occur to release crystals from the mass into the column 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 February 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 1996.
- 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.