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Expired Canadian patentCanada

Cooling method and arrangement

CA 1053569 A · Owner: Krieger, Henrich · Inventors: Krieger, Henrich

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

Abstract of the Disclosure: A cooling arrangement to be used in liquefying natural gas and in similar applications and having an incorporated cascade circuit with a fractional condensation of a cooling medium and with separation of the phases of the cooling medium, has such a lay-out and is so operated that the warming-up of the expanded cooling medium in a countercurrent evaporative heat exchange and the warming-up of the expanded cooling medium in a countercurrent supercooling heat exchange are in parallel to one another. The separated gaseous phase of the cooling medium is cooled in the countercurrent evaporative heat exchange to be at least partially condensed. Preferably, the …

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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 May 1, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 21, 1977
GrantedMay 1, 1979
Term endedMay 1, 1996
Patent numberCA 1053569 A
Classification (IPC)F25J1/02 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJune 21, 1977Patent grantedMay 1, 1979Term endedMay 1, 1996

Sources & verification

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