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Expired Canadian patentCanada

Apparatus for magnetocaloric refrigeration

CA 1262375 C · Owner: Peschka, Walter · Inventors: Schneider, Gottfried; Peschka, Walter

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

A b s t r a c t, An apparatus for magnetocaloric refrigeration comprising a, ferromagnetic material arranged in a rotor and alternately entering and exiting from a stationary magnetic field when the rotor rotates, and also comprising a circuit for a working gas coming into successive heat exchange contact with a ferromagnetic material arranged outside the magnetic field and thereby cooled a refrigeration load, a ferromagnetic material located within the magnetic field and thereby heated as well as an external negative heat source. In order to avoid problems with seals in such an apparatus at low temperatures, it is suggested that discrete members consisting of ferromagnetic material be …

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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 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 17, 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.
FiledNovember 7, 1986
GrantedOctober 17, 1989
Term endedOctober 17, 2006
Patent numberCA 1262375 C
Classification (IPC)F25B21/00

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedNov 7, 1986Patent grantedOct 17, 1989Term endedOct 17, 2006

Sources & verification

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