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Expired Canadian patentCanada

Apparatus for preparing, classifying, and metering particle media

CA 1324591 C · Owner: Rowe, Robert D. · Inventors: Visaisouk, Somyong; Rowe, Robert D.; Mesher, Terry B.

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

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Abstract From the Canadian patent

Apparatus for preparing classifying, and metering, particle media useful for various purposes including blast cleaning and treating systems includes an impeller for taking a media input having a working particle size range and sending the media particles along with a fluidizing air input through a scroll, as well as a classifier/surge tank acting as a cyclone separator connected to the fluidized particle/air stream output of the scroll. An eductor nozzle assembly is provided for taking the lighter portions of the particles from the cyclone separator and transporting this to recovery or utilization whilst a metering device takes the heavier portions of the particles from the cyclone …

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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 November 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 2010.
  • 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 12, 1989
GrantedNovember 23, 1993
Term endedNovember 23, 2010
Patent numberCA 1324591 C
Classification (IPC)B24C7/00 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedSep 12, 1989Patent grantedNov 23, 1993Term endedNov 23, 2010

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