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Expired Canadian patentCanada

Magnetron device

CA 1285653 C · Owner: Hikino, Tadashi · Inventors: Nobue, Tomotaka; Matsumoto, Tomohide; Hikino, Tadashi

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

The present invention is directed to a magnetron device which includes an anode cylinder incorporated with multiresonant cavities, an output antenna arranged in a direction normal to the axis of the anode cylinder a set of strap rings, arranged through holes in vanes an antenna lead having its one, end directly connected to the strap ring and its other end, connected to the output antenna and an exhaust pipe provided, at one end of said anode cylinder. The magnetron device operates at high efficiency, is compact in size and low in noise.

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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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2008.
  • 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 15, 1987
GrantedJuly 2, 1991
Term endedJuly 2, 2008
Patent numberCA 1285653 C
Classification (IPC)H01J23/22 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedOct 15, 1987Patent grantedJuly 2, 1991Term endedJuly 2, 2008

Sources & verification

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