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Expired Canadian patentCanada

Apparatus for conveying granular material

CA 1090304 A · Owner: Persson, Sven J. · Inventors: Persson, Sven J.

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

Apparatus for removing granular material from a container or a bin to a conveyor laterally spaced from the container or bin, in which the material carrying member of the conveyor is level with or only slightly lower than the lower edge of a discharge port provided in a side wall of the container or bin, and in which a horizontal sheet is provided between the lower edge and the conveyor. This sheet forms the root of a chamber which is to be connected to the pressure side of a fan and is provided with a large number of slits defining orifices which are vertical and face the conveyor whereby the current of gas discharged through the orifices effects a transport of the material from 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 November 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 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.
FiledJanuary 11, 1979
GrantedNovember 25, 1980
Term endedNovember 25, 1997
Patent numberCA 1090304 A
Classification (IPC)B67D99/00

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Application filedJan 11, 1979Patent grantedNov 25, 1980Term endedNov 25, 1997

Sources & verification

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