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Expired Canadian patentCanada

Continuous heating apparatus for metal caps

CA 1136719 A · Owner: Toyo Seikan Kaisha, Ltd. · Inventors: Ishibashi, Kazuhisa; Omi, Hidehiko

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

A continuous heating apparatus for metal caps having at least one pair of high frequency electric conductors where the conductors are separated by an interval smaller than the diameter of the bottoms of the caps to be heated. A guide panel is spaced from the conductors and is adapted to engage the open end of the metal caps when the caps are moved away from the conductors towards the guide panel due to the repulsion effect occurring between the high frequency current in the conductors and current induced in the caps. A transport means moves the metal caps relative to the conductors.

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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 November 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 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.
FiledMay 3, 1979
GrantedNovember 30, 1982
Term endedNovember 30, 1999
Patent numberCA 1136719 A
Classification (IPC)H05B6/02 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedMay 3, 1979Patent grantedNov 30, 1982Term endedNov 30, 1999

Sources & verification

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