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Expired Canadian patentCanada

Mechanically stirred furnace and method of operation

CA 1090566 A · Owner: Kennecott Copper Corporation · Inventors: Crimes, Peter B.; Ammann, Paul R.; Kim, Jonathan J.

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Abstract From the Canadian patent

The present specification disclose a pyrometallurgical system for maintaining a material in a molten state and a method therefor, the system comprising a vessel for molten material, the vessel conceptually dividable into a number of substantially uniform sells. A mechanical stirrer is provided for each cell and is centered within the cell. The stirrers are sired and driven at a rate so as to promote a uniform temperature and composition of the molten material and improved heat transfer between and blending of, various constitutions of molten material while producing minimal erosion of the conventional refractory lining of the vessel. Preferably adjacent, pairs of stirrers are driven with …

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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 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 22, 1977
GrantedDecember 2, 1980
Term endedDecember 2, 1997
Patent numberCA 1090566 A
Classification (IPC)C22B9/02 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedFeb 22, 1977Patent grantedDec 2, 1980Term endedDec 2, 1997

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.