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Expired Canadian patentCanada

Manufacture of an alkali metal aluminium halide compound and alkalimetal

CA 1311212 C · Owner: Coetzer, Johan · Inventors: Wedlake, Roger John; Coetzer, Johan

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Abstract From the Canadian patent

The invention relates to a method of making an (alkali metal) (metal) halide compound and an alkali metal the compound having the, formula MHalx+1 in which D is a metal; M is an alkali metal; Hal is a halide; and x is the valency of the metal D. The method comprises exposing to one another molten MDHalx+1 compound a metal (D) and an, alkali metal halide according to the formula MHal where the M and Hal in the MHal are as defined above and are the same alkali metal and halide respectively as in the MDHalx+1; and separating the MDHalx+1 compound from a molten alkali metal which is the same as the alkali metal in the MDHalx+1 and the MHal, by means of a separator which is in contact with both …

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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 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 3, 1987
GrantedDecember 8, 1992
Term endedDecember 8, 2009
Patent numberCA 1311212 C
Classification (IPC)C25C3/02 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJune 3, 1987Patent grantedDec 8, 1992Term endedDec 8, 2009

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