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Expired Canadian patentCanada

Forage conveying apparatus

CA 1115180 A · Owner: Sperry Corporation · Inventors: Priepke, Edward H.; Wagstaff, Robert A.; Phillips, Frederick W.

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

Forage conveying apparatus for a forage harvester having a longitudinally extending frame supported by at least one pair of transversely spaced wheels. A cutterhead unit mounted on the frame includes a housing having a rear crop outlet. Within the housing a shear bar is mounted adjacent the path of the knives of a transverse cylindrical cutterhead rotatably mounted in cooperative relationship with the shear bar for cutting crop material fed thereto. Mounted on the frame rearwardly of the cutterhead unit is a blower unit with a housing having a crop inlet in communication with the crop outlet of the cutterhead unit. The blower includes a rotatably mounted conical base plate and blades …

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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 December 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 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.
FiledFebruary 5, 1980
GrantedDecember 29, 1981
Term endedDecember 29, 1998
Patent numberCA 1115180 A
Classification (IPC)A01F29/00 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Application filedFeb 5, 1980Patent grantedDec 29, 1981Term endedDec 29, 1998

Sources & verification

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