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Expired Canadian patentCanada

Atmospheric-fluid indirect heat exchanger

CA 1110614 A · Owner: Hamon-Sobelco, S.A. · Inventors: Verwilghen, Bruno F.M.C.

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

An atmospheric-fluid indirect heat exchanger wherein the fluid to be cooled has a freezing temperature which may be higher than the expected lowest ambient temperature is provided with an auxiliary ambient air-second fluid heat exchanger wherein the second fluid has a freezing point lower than the expected lowest ambient temperature to heat the ambient air to a temperature to prevent freezing of the fluid in the atmospheric-fluid indirect heat exchanger.

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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 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 20, 1978
GrantedOctober 13, 1981
Term endedOctober 13, 1998
Patent numberCA 1110614 A
Classification (IPC)F28D21/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedDec 20, 1978Patent grantedOct 13, 1981Term endedOct 13, 1998

Sources & verification

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