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Expired Canadian patentCanada

Combination cryogenic and mechanical freezing system

CA 1310198 C · Owner: Rasovich, Ivan · Inventors: Rasovich, Ivan

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

A freezing system combining a cryogenic freezer and a mechanical refrigeration freezer, with the cryogenic vapor from the cryogenic freezer being used to lower the temperature of the air in the refrigeration freezer. The cryogenic vapor from the cryogenic freezer is passed through a heat exchanger in the refrigeration freezer with the heat exchanger positioned downstream of the evaporator coil of the refrigeration freezer and upstream of the product conveyor belt.

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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 November 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 2009.
  • 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 13, 1989
GrantedNovember 17, 1992
Term endedNovember 17, 2009
Patent numberCA 1310198 C
Classification (IPC)F25D17/02 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJune 13, 1989Patent grantedNov 17, 1992Term endedNov 17, 2009

Sources & verification

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