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Expired Canadian patentCanada

Process for coating inorganic substrates with carbides, nitrides and/or carbonitrides

CA 1047899 A · Owner: Bitzer, Diethelm · Inventors: Lohmann, Dieter; Bitzer, Diethelm

CIPO record

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Abstract From the Canadian patent

A process for coating inorganic substrates especially metallic or metalloid substrates; sintered metal carbides and carbon materials with carbides nitrides and/or, carbonitrides; using certain nitriles as sources of carbon and nitrogen, is described. High deposition rates and smooth coatings of good to very good adhesion are achievable by this process.

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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 February 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 1996.
  • 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—
GrantedFebruary 6, 1979
Term endedFebruary 6, 1996
Patent numberCA 1047899 A
Classification (IPC)C23C16/32 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedFeb 6, 1979Term endedFeb 6, 1996

Sources & verification

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