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Expired Canadian patentCanada

Electromagnet system with protection against overheating

CA 1251823 A · Owner: Bosch-Siemens Hausgerate G.M.B.H. · Inventors: Farber, Karlheinz; Aschberger, Matthias; Deininger, Anton

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 electromagnetic assembly including an electromagnetic coil wound on a core of ferromagnetically conductive material. A temperature protection circuit includes a fuse which breaks when the electromagnetic assembly becomes overheated. The fuse is thermally coupled to pole pieces of the assembly and is in electrical circuit with the coil.

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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 March 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 28, 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.
FiledAugust 21, 1985
GrantedMarch 28, 1989
Term endedMarch 28, 2006
Patent numberCA 1251823 A
Classification (IPC)H01F7/06 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedAug 21, 1985Patent grantedMarch 28, 1989Term endedMarch 28, 2006

Sources & verification

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