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Expired Canadian patentCanada

Refrigerant charge adjuster apparatus

CA 1087707 A · Owner: Trane Company Of Canada Limited · Inventors: Saunders, James F.

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

By: James F. Saunders ABSTRACT OF THE DISCLOSURE, Herein is disclosed an electronically controlled apparatus for accurately charging and/or venting refrigerant for an air conditioning system having an air cooled condenser and capillary tube control. The system includes means for stabilizing the sensed pressure values means for rapidly, charging a refrigeration system having a gross undercharge means for automatically terminating the operation of the charge adjuster and means utilizing condenser heat to increase the speed at which refrigerant may be added to the refrigeration apparatus.

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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 October 14, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 1997.
  • 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 21, 1980
GrantedOctober 14, 1980
Term endedOctober 14, 1997
Patent numberCA 1087707 A
Classification (IPC)G05D23/19

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Application filedApril 21, 1980Patent grantedOct 14, 1980Term endedOct 14, 1997

Sources & verification

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