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Expired Canadian patentCanada

Ore halogenation process

CA 1088316 A · Owner: Toth Aluminum Corporation · Inventors: Terry, John C.; Wyndham, Ronald

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Abstract From the Canadian patent

One of the major obstacles toward the needed and economic production of alumina and other values from kaolinitic clay and other ores by chlorination has been the slow reaction rates and low yields of the metal values. The present invention provides methods for improving reaction rates and/or yields in the halogenation of various ores which comprises the addition of sulfur and/or functionally equivalent sulfur-containing compounds as an ore conditioning agent and/or reaction promoter. These improvements also permit operation at low temperatures with advantage of savings of energy and or equipment and maintenance costs. The invention is applicable to both displacement halogenation and …

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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 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 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.
FiledDecember 17, 1976
GrantedOctober 28, 1980
Term endedOctober 28, 1997
Patent numberCA 1088316 A
Classification (IPC)C22B5/02 +2 more

Timeline

Timeline From CIPO dates

1977198019831986198919921995Application filedDec 17, 1976Patent grantedOct 28, 1980Term endedOct 28, 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.