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Expired Canadian patentCanada

Device for controlling capacity of compressor

CA 1257366 A · Owner: Sanden Corporation · Inventors: Sato, Motoharu

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

A control device for a variable capacity compressor in an automotive air conditioning system includes a first temperature sensor disposed forward of the evaporator, a second temperature sensor disposed behind the evaporator and a third temperature sensor disposed at the outside of the automobile compartment. 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 July 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 11, 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.
FiledFebruary 9, 1987
GrantedJuly 11, 1989
Term endedJuly 11, 2006
Patent numberCA 1257366 A
Classification (IPC)G05D23/19 +2 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedFeb 9, 1987Patent grantedJuly 11, 1989Term endedJuly 11, 2006

Sources & verification

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