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Expired Canadian patentCanada

Method and apparatus for mixing loose material

CA 1102788 A · Owner: Waeschle Maschinenfabrik G.M.B.H. · Inventors: Krambrock, Wolfgang; Lubbehusen, Paul

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

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Abstract From the Canadian patent

Material to be mixed is fed into the upper portion of a container from where the material descends by means of the force of gravity. The container is provided with a partition extending across the interior of the container and operative to divide the descending material into at least two compartments giving at least two separated substreams. The container is further provided with outlets for the compartments and means for, varying the cross sections of the outlets so as to separately control the respective rates of descent of the material of the two substreams in the container. The material which is withdrawn at the lower portion of the container is returned back to the upper portion of the …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 June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 22, 1978
GrantedJune 9, 1981
Term endedJune 9, 1998
Patent numberCA 1102788 A
Classification (IPC)B01F5/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedSep 22, 1978Patent grantedJune 9, 1981Term endedJune 9, 1998

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