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Expired Canadian patentCanada

Universal corn picking row unit

CA 2177747 C · Owner: Calmer, Marion · Inventors: Calmer, Marion

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

This corn harvesting row unit, which can be assembled into a corn header capable of efficiently harvesting individual rows of corn regardless of the row width. This improvement or novel structure is configured to reduce the number of moving parts required for the efficient harvesting of corn and in addition reduces the power requirements. This novel corn unit will assemble as a corn head with any number of rows and wherein each row unit is capable of harvesting individually the planted row assigned to it. This novel corn row unit permits the efficient gathering of narrow row larger spacing corn populations, as well as wider rows and closer spacing populations. Efficient harvesting of narrow …

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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

  • Filed May 30, 1996 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 30, 1996
GrantedMay 16, 2000
Term endedMay 30, 2016
Patent numberCA 2177747 C
Classification (IPC)A01D45/02

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedMay 30, 1996Patent grantedMay 16, 2000Term endedMay 30, 2016

Sources & verification

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