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Expired Canadian patentCanada

System for control of the electroslag remelting

CA 1234595 A · Owner: Institute Po Metaloznanie I Technologia Na Metalite · Inventors: Valkov, Lyudmil K.; Stoyanov, Stoyan M.; Rasheva, Ivanka A.

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Abstract From the Canadian patent

A system for controlling electroslag remelting which comprises a recorder of arc discharges having an input connected to a current-carrying busbar of a crystallization mould. The arc discharge recorder also has an output connected to a first input of a device for varying a rate of feed of a remelting electrode. The rate varying device further comprises a second input connected to an electrode feed rate presetting device, and an output connected via a speed regulator to a mechanism for actuating the remelting electrode. The current-carrying busbar is connected to a valve effect recorder having an output connected via a regime varying device to a third input of the electrode feed rate varying …

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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 March 29, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 29, 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.
FiledDecember 7, 1983
GrantedMarch 29, 1988
Term endedMarch 29, 2005
Patent numberCA 1234595 A
Classification (IPC)H05B3/60 +2 more

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedDec 7, 1983Patent grantedMarch 29, 1988Term endedMarch 29, 2005

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