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Expired Canadian patentCanada

Nickel-chromium alloy of improved fatigue strength

CA 1323777 C · Owner: Tassen, Curtis Steven · Inventors: Wheeler, Jack Milton; Tassen, Curtis Steven; Smith, Gaylord Darrell

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

The low cycle and thermal fatigue life of special nickel-chromium molybdenum alloys are improved by controlling percentages of carbon nitrogen and, silicon such that the sum of any carbon plus nitrogen plus 1/10th silicon does not exceed 0.04% and preferably 0.035%.

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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 November 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 2010.
  • 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 17, 1987
GrantedNovember 2, 1993
Term endedNovember 2, 2010
Patent numberCA 1323777 C
Classification (IPC)C22C19/05 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedAug 17, 1987Patent grantedNov 2, 1993Term endedNov 2, 2010

Sources & verification

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