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Expired Canadian patentCanada

Continuous method for manufacturing grain-oriented magnetostrictive bodies

CA 1309320 C · Owner: Schmidt, Frederick A. · Inventors: Verhoeven, John D.; Mcmasters, O. Dale; Gibson, Edwin D.

CIPO record

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Abstract From the Canadian patent

The invention comprises a continuous casting and crystallization method for manufacturing grain-oriented magnetostrictive bodies. A magnetostrictive alloy is melted in a crucible having a bottom outlet. The melt is discharged through the bottom of the crucible and deposited in an elongated mold. Heat is removed from the deposited melt through the lower end portion of the mold to progressively solidify the melt. The solid-liquid interface of the melt moves directionally upwardly from the bottom to the top of the mold to produce the axial grain orientation.

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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 October 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 2009.
  • 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 1, 1988
GrantedOctober 27, 1992
Term endedOctober 27, 2009
Patent numberCA 1309320 C
Classification (IPC)B22D27/04 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMarch 1, 1988Patent grantedOct 27, 1992Term endedOct 27, 2009

Sources & verification

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