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Expired Canadian patentCanada

Thermal spray powdered composite

CA 1113512 A · Owner: Dresser Industries, Inc. · Inventors: Grubba, Donald C.

CIPO record

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

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Abstract From the Canadian patent

Abstract of the Disclosure A composite powder suitable for use in thermal spray applications as a wear and/or corrosion resistant coating comprising chromic oxide, magnesium oxide iron oxide, titanium oxide, and aluminum oxide. More specifically there is provided a complex composition powder comprising by weight, from about 40% to 50% Cr2O3, about 1 to 10% MgO, about 2 to 10% Fe2O3 about, 1 to 10% TiO2 and about 5 to 40% Al2O3.

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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 December 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 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 29, 1978
GrantedDecember 1, 1981
Term endedDecember 1, 1998
Patent numberCA 1113512 A
Classification (IPC)C04B35/42 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedSep 29, 1978Patent grantedDec 1, 1981Term endedDec 1, 1998

Sources & verification

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