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Expired Canadian patentCanada

Apparatus for automatically charging scrap into arc furnace

CA 1235570 A · Owner: Ishikawajima-Harima Jukogyo Kabushiki Kaisha · Inventors: Tomizawa, Fumio; Nanjo, Toshio

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 apparatus for automatically charging scrap into an arc furnace wherein an inactive position at which a scrap bucket charged with the scrap is normally placed is provided adjacent to the arc furnace; a transport mechanism is provided so that the scrap bucket is moved between said position and the arc furnace; and the scrap bucket is brought to and stopped at a position right above the arc furnace and is lowered to a predetermined level so as to charge the scrap into the arc furnace.

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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 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2005.
  • 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 2, 1984
GrantedApril 26, 1988
Term endedApril 26, 2005
Patent numberCA 1235570 A
Classification (IPC)F27D3/06 +2 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedOct 2, 1984Patent grantedApril 26, 1988Term endedApril 26, 2005

Sources & verification

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