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Expired Canadian patentCanada

Device for controlling the capacity of a variable capacity compressor

CA 1252177 A · Owner: Sanden Corporation · Inventors: Sato, Motoharu

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A control device for a variable capacity compressor in an automotive air conditioning system. The control device includes a first sensor disposed forward of the evaporator and a second sensor disposed behind the evaporator. The control device compares the air temperatures detected by the sensors with predetermined temperatures and, controls the capacity of the compressor in accordance with the compared results.

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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 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 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.
FiledJanuary 31, 1986
GrantedApril 4, 1989
Term endedApril 4, 2006
Patent numberCA 1252177 A
Classification (IPC)F25B49/02 +1 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedJan 31, 1986Patent grantedApril 4, 1989Term endedApril 4, 2006

Sources & verification

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