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Expired Canadian patentCanada

Improved planting apparatus and related method

CA 2224138 C · Owner: Connell, James W. Jr. · Inventors: Spencer, Sarah E.; Connell, James W. Jr.

CIPO record

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Abstract From the Canadian patent

A new mobile planting apparatus has first and second ranks of powered row units and first and second power devices connected respectively to and providing driving horsepower to such ranks. Suitable power devices include mechanical, electrical and hydraulic types with the latter being preferred. Each power device includes a control mechanism permitting the driving horsepower provided to the respective ranks to be independently controlled. That is, each power device may be independently operated or disabled and the power devices may run at different speeds and horsepowers. The disclosure also involves a new method for planting seeds in a field. The method enables a grower using two ranks of …

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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 December 9, 1997 and granted July 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 9, 1997
GrantedJuly 2, 2002
Term endedDecember 9, 2017
Patent numberCA 2224138 C
Classification (IPC)A01C19/02 +2 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedDec 9, 1997Patent grantedJuly 2, 2002Term endedDec 9, 2017

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