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Expired Canadian patentCanada

Squeeze casting process

CA 1102993 A · Owner: Babcock & Wilcox Company (The) · Inventors: Lacount, Dale F.

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Abstract From the Canadian patent

A process for squeeze casting high melting point alloys within given dimension ranges and including a refractorycoated lower die formed with a cavity and a movable refractorycoated upper die selected on the basis of predetermined heat extraction rates before and during the application of pressure. The upper and lower dies are preheated to predetermined temperatures. A measured quantity of molten alloy is poured at a predetermined temperature range into the lower die cavity so that the thickness dimension of the case alloy faces the sides of the cavity. The application of pressure is delayed for a predetermined time, thereafter, the upper die is inserted into the cavity and a predetermined …

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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 June 16, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 14, 1978
GrantedJune 16, 1981
Term endedJune 16, 1998
Patent numberCA 1102993 A
Classification (IPC)B22D17/04

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedSep 14, 1978Patent grantedJune 16, 1981Term endedJune 16, 1998

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