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Expired Canadian patentCanada

Evaporative heat exchanger

CA 1267540 C · Owner: Valuepace Limited · Inventors: Maule, Russell R.

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

This invention is directed to a method of transferring heat from a first fluid to a second the, temperature of the first being less than the boiling point of the second at ambient pressure comprising the, steps of: causing the fluids to come into heat flow communication; and reducing the pressure of the second fluid so that it boils at or below the temperature of the first. Further the invention is directed to a heat exchanger (1) for performing the method comprising a, pressure vessel (2), at least one tube (3) for conducting a fluid into, within, and out of the vessel (2) means for admitting a cooling medium to the vessel (2) and for directing it over the exterior surface of the tube (3) …

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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 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 28, 1985
GrantedApril 10, 1990
Term endedApril 10, 2007
Patent numberCA 1267540 C
Classification (IPC)F28D1/06 +1 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedOct 28, 1985Patent grantedApril 10, 1990Term endedApril 10, 2007

Sources & verification

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