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Expired Canadian patentCanada

Shielded plastic microwave oven and preparation thereof

CA 1185489 A · Owner: General Electric Company · Inventors: Wojnarowski, Robert J.; Cohen, Peter I.; Eichelberger, Charles W.

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 microwave oven cabinet is constructed with plastic materials and has a low resistivity coating on the outside surfaces thereof, which coating is achieved by applying a mixture of a metallic powder and polymer on the surfaces and curing the polymer followed by an, augmentation replacement reaction being effected to replace some of the metallic powder with a more noble metal in such a way that the total volume on the surface of deposited metal exceeds that of the original metal powder replaced at the surface.

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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 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 11, 1982
GrantedApril 16, 1985
Term endedApril 16, 2002
Patent numberCA 1185489 A
Classification (IPC)F24C7/02 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedMarch 11, 1982Patent grantedApril 16, 1985Term endedApril 16, 2002

Sources & verification

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