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Expired Canadian patentCanada

Method for enhancing artificially magnetic separation of minerals by the use of preconditioning reagents

CA 1077441 A · Owner: Financial Mining - Industrial And Shipping Corporation · Inventors: Frangiskos, Antonios; Gambopoulos, Theodor

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The present invention provides a method for the benefication of ores and minerals which comprises crushing the ores to a particulate size, conditioning the surface of ore or mineral to be separated by treatment with a reagent so as to selectively absorb on said surface a finely ground material with strong ferro-magnetic or paramagnetic properties treating, the conditioned ore or mineral with said finely ground material to effect said selective absorption and separating the ore or mineral which has absorbed said material by magnetic separation.

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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 May 13, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 13, 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.
Filed—
GrantedMay 13, 1980
Term endedMay 13, 1997
Patent numberCA 1077441 A
Classification (IPC)B03B1/00 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedMay 13, 1980Term endedMay 13, 1997

Sources & verification

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