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Expired Canadian patentCanada

Method and apparatus for the separation of a mixture of mineral grains in water

CA 1069859 A · Owner: Centralny Osrodek Projektowo-Konstruckcyjny Maszyn Gorniczych "Komag" · Inventors: Jachna, Waclaw; Szczesny, Adolf; Jedo, Antoni

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Abstract From the Canadian patent

A method and an apparatus for separating a mixture of mineral grains with different specific gravities by differential sedimentation are disclosed. The method is carried out in a cylindrical device. The mixture of the mineral with water is supplied tangentially to a trough formed around the upper edge of the wall of the water box of the device. The mineral circulating in the trough is desludged and partially separated according to the weight of the grains and then, due to a pulsating action of the water is displaced in an annular, working trough on spiral paths towards a conduit for discharging the light fraction and towards a conduit with a diaphragm for discharging the heavy fraction. 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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 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—
GrantedJanuary 15, 1980
Term endedJanuary 15, 1997
Patent numberCA 1069859 A
Classification (IPC)B03B5/20

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJan 15, 1980Term endedJan 15, 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.