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Expired Canadian patentCanada

System and method for scheduling irrigation

CA 1250638 A · Owner: The Standard Oil Company · Inventors: Keenen, Melvin; Gardner, Bronson

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Abstract From the Canadian patent

A system and method for scheduling irrigation of an agricultural area in which a crop is being grown, which is primarily based on the measurement of actual plant responses to soil water deficits for efficient and effective irrigation. The system and method are characterized by plural sensors for sensing a plurality of parameters related to the agricultural area, including crop canopy temperature from which the water stress, condition of the crop can be determined and for generating sensor data, respectively representative of the sensed parameters; an electronic device operatively connected to the sensors for controllably receiving the sensor, data from the sensors and deriving therefrom …

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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 February 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 28, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 22, 1986
GrantedFebruary 28, 1989
Term endedFebruary 28, 2006
Patent numberCA 1250638 A
Classification (IPC)A01G25/16

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedApril 22, 1986Patent grantedFeb 28, 1989Term endedFeb 28, 2006

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