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Expired Canadian patentCanada

Casting in a thermally-induced, low density atmosphere

CA 1268923 C · Owner: Allied Corporation · Inventors: Liebermann, Howard Horst

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

An apparatus and method for casting metal strip include a moving chill body that has a quench surface. A nozzle mechanism deposits a stream of molten metal on a quenching region of the quench surface to form the strip. The nozzle mechanism has an exit portion with a nozzle orifice. A depletion mechanism heats a gas to lower the density thereof and to produce a low-density atmosphere. The gas is supplied to a depletion region located adjacent to and upstream of the quenching region to provide the low density atmosphere within the depletion region.

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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 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 2007.
  • 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 27, 1984
GrantedMay 15, 1990
Term endedMay 15, 2007
Patent numberCA 1268923 C
Classification (IPC)B22D11/12 +2 more

Timeline

Timeline From CIPO dates

19851988199119941997200020032006Application filedMarch 27, 1984Patent grantedMay 15, 1990Term endedMay 15, 2007

Sources & verification

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