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Expired Canadian patentCanada

Method of operating an electronic automatic transmission system

CA 1316014 C · Owner: Chrysler Motors Corporation · Inventors: Mehta, Hemang S.

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

The present invention is a method of controlling the overall operation of an automatic transmission with an electronic controller. The method is used in a vehicle having an engine and a transmission including an input member, a torque converter assembly for transmitting torque between the engine and the input member an output member, a gear assembly for changing the ratio of torque between the input member and output member. A plurality of friction elements are provided for shifting the gear assembly with a fluid actuating device being movable to engage and disengage at least one friction element. At least one solenoidactuated valve is movable in response to the presence or absence 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

  • Granted April 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 13, 2010.
  • 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 27, 1989
GrantedApril 13, 1993
Term endedApril 13, 2010
Patent numberCA 1316014 C
Classification (IPC)F16H59/04 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedApril 27, 1989Patent grantedApril 13, 1993Term endedApril 13, 2010

Sources & verification

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