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Expired Canadian patentCanada

Windrow turning apparatus

CA 1291647 C · Owner: Laquerre, Yves · Inventors: Laquerre, Yves

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

The present invention relates to an apparatus for inverting a windrow of hay or the like. The apparatus is in the form of an implement to be drawn by a tractor or any other appropriate vehicle and comprises a wheeled carriage on which is mounted a pick-up conveyor assembly for gathering an elevating material from a windrow and depositing the elevated material on a rotating platform which moves the material 180 degrees along a circular path. The material is then discharged on the ground in inverted condition by the forward motion of the carriage.

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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 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 5, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 31, 1987
GrantedNovember 5, 1991
Term endedNovember 5, 2008
Patent numberCA 1291647 C
Classification (IPC)A01D84/00

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedMarch 31, 1987Patent grantedNov 5, 1991Term endedNov 5, 2008

Sources & verification

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