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Expired Canadian patentCanada

Method of isothermal forging

CA 1106353 A · Owner: Trw Inc. · Inventors: Moracz, Donald J.; Spiegelberg, William D.

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

A composition useful in isothermal forging or sizing of metal articles comprising a major amount of a glass moiety fusible at a temperature below forging or sizing temperature and a minor amount of a finely divided abrasive moiety dispered in the glass moiety and having a predetermined hardness.

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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 August 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 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.
FiledDecember 27, 1978
GrantedAugust 4, 1981
Term endedAugust 4, 1998
Patent numberCA 1106353 A
Classification (IPC)B21J3/00 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedDec 27, 1978Patent grantedAug 4, 1981Term endedAug 4, 1998

Sources & verification

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