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Expired Canadian patentCanada

Corn harvester machine with mechanism for picking up downed cornstalks and retrieving ears therefrom

CA 1215845 A · Owner: Mak, Randall L. · Inventors: Young, Larry W.; Mak, Randall L.

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

Abstract, A corn harvester machine with an improved corn head for picking up downed cornstalks. The head has some conventional components including a cross auger conveyor with a forwardly open trough and a base portion extending forwardly and downwardly from it, pairs of horizontally spaced stripper plates with gathering chains and snapping rolls running above and below them and defining a plurality stalk-receiving throats. A lower cowl is fixedly mounted between each adjacent pair of stripper plates and a downwardly concave upper cowl is nested over each lower cowl and pivotally journaled to it for up and down tilting movement about a horizontal tilting axis at the cowl rear end portions. …

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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 30, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 2003.
  • 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 5, 1985
GrantedDecember 30, 1986
Term endedDecember 30, 2003
Patent numberCA 1215845 A
Classification (IPC)A01D45/02

Timeline

Timeline From CIPO dates

198619881990199219941996199820002002Application filedMarch 5, 1985Patent grantedDec 30, 1986Term endedDec 30, 2003

Sources & verification

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