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Expired Canadian patentCanada

Repair of steel articles by exothermic reaction

CA 1080950 A · Owner: Uss Engineers And Consultants · Inventors: Kachik, Robert H.

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 method of repairing erosion cavities in large steel articles, such as slag and cinder pots by employing a plurality of successive aluminothermic reduction reaction charges without using containment perimeters and without preheating the article. The resultant repaired article has a metallurgically bonded plug in the eroded surface.

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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 July 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 8, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJuly 8, 1980
Term endedJuly 8, 1997
Patent numberCA 1080950 A
Classification (IPC)B23K23/00

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJuly 8, 1980Term endedJuly 8, 1997

Sources & verification

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