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Expired Canadian patentCanada

Electro-slag casting apparatus and method

CA 1329692 C · Owner: Broken Hill Proprietary Company Limited (The) · Inventors: Bramblett, John Dean

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

Apparatus for cladding and thus reclaiming a worn rolling mill roll by fusing a surface layer thereon comprises an electro-slag mould (7); a slewable derrick structure (Fig. 2) able to feed a split tubular consumable, electrode (51) into the mould; a turn-table (8) supporting the mould; a tiltable induction furnace (55) to charge the mould with molten flux; product transport means (Fig.1) to lift a worn mill roll through the mould and withdraw it downwardly from the mould as cladding proceeds and comprising rigid hangers (12) extending downwardly from the turn-table, an elevator carriage (14) with a product holder and adapter including a mould plug (29) and power driven, jack screws (19) to …

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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 May 24, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 30, 1989
GrantedMay 24, 1994
Term endedMay 24, 2011
Patent numberCA 1329692 C
Classification (IPC)C22B9/18 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMarch 30, 1989Patent grantedMay 24, 1994Term endedMay 24, 2011

Sources & verification

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