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Expired Canadian patentCanada

Wear-resistant stainless steel

CA 1206023 A · Owner: Cabot Corporation · Inventors: Crook, Paul; Zordan, Richard 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 high chromium stainless steel especially suited for use as wear (galling) resisting components for example, valve parts. A typical alloy generally contains chromium nickel, silicon, carbon, an effective cobalt content and the balance iron plus normal impurities. The alloy may be produced in the form of castings, P/M products, hardfacing and welding materials and wrought mill products.

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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 17, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 2003.
  • 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, 1983
GrantedJune 17, 1986
Term endedJune 17, 2003
Patent numberCA 1206023 A
Classification (IPC)C22C30/00 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedSep 14, 1983Patent grantedJune 17, 1986Term endedJune 17, 2003

Sources & verification

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