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Expired Canadian patentCanada

Method and apparatus for direct casting of crystalline strip by radiantly cooling

CA 1237270 A · Owner: Allegheny Ludlum Corporation · Inventors: Nauman, John D.; Johns, Robert H.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method is provided for directly casting molten metal from a U-shaped structure of the exit end of a casting vessel onto a moving casting surface to form a continuous strip of crystalline material. The method includes radiantly cooling the molten metal in a zone defined above the molten metal across the width of the, U-shaped structure and adjacent the casting surface. The method also includes providing a non-oxidizing atmosphere in the zone. An apparatus is also provided.

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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 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 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.
FiledAugust 28, 1985
GrantedMay 31, 1988
Term endedMay 31, 2005
Patent numberCA 1237270 A
Classification (IPC)B22D11/06

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedAug 28, 1985Patent grantedMay 31, 1988Term endedMay 31, 2005

Sources & verification

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