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Expired Canadian patentCanada

Heat pump systems

CA 1257777 A · Owner: Foster Wheeler Energy Limited · Inventors: Page, John K.R.

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

Improvements in and relating to Heat Pump Systems, The present invention relates to an improved heat pump system of a heating system which also comprises a utilization circuit. The heat pump system comprises a generator (2), an absorber (1), a condenser (5) and an evaporator (7), and the utilization circuit for circulation of a heat carrier medium comprises heat exchanger means (1a, 5a, 15, 17) for removing thermal energy from the heat pump system. To supplement the thermal output of the heat pump system, when the utilization circuit requires a greater thermal output than can efficiently be achieved by the heat pump system alone, a supplementary condenser (25) is provided in the generator, …

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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 25, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 25, 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 3, 1986
GrantedJuly 25, 1989
Term endedJuly 25, 2006
Patent numberCA 1257777 A
Classification (IPC)F24J3/00 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedFeb 3, 1986Patent grantedJuly 25, 1989Term endedJuly 25, 2006

Sources & verification

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