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Expired Canadian patentCanada

Microwave oven having rotating conductive radiators

CA 1134449 A · Owner: Raytheon Company · Inventors: Osepchuk, John M.

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 having a rotating radiator formed of a plurality of conductive radiating elements separately fed by transmission line members spaced from and rotated about the axis of a conductor extending through an aperture in the ground plane. Said members together with the adjacent portions of the oven wall form a plurality of strip transmission lines fed by said conductor and supplying radiating elements in the oven from a microwave source through said ground plane aperture.

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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 26, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 26, 1979
GrantedOctober 26, 1982
Term endedOctober 26, 1999
Patent numberCA 1134449 A
Classification (IPC)F24C7/02 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedOct 26, 1979Patent grantedOct 26, 1982Term endedOct 26, 1999

Sources & verification

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