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Expired Canadian patentCanada

Aluminum coated low-alloy steel foil

CA 1232171 A · Owner: Inland Steel Company · Inventors: Nickola, Richard A.

CIPO record

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Abstract From the Canadian patent

Aluminum Coated Low-Alloy Steel Foil, ABSTRACT OF THE DISCLOSURE A cold-rolled low-titanium alloy steel foil having a cold rolled metallic aluminum hot-dip coated surface which is adapted for growing a thick surface coating of spine-like whiskers of aluminum oxide suitable for retaining a coating of a metallic catalyst which is formable at room temperature without annealing and which exhibits good resistance to oxidation at temperatures up to 1149°C (2100°F).

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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 2, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 30, 1985
GrantedFebruary 2, 1988
Term endedFebruary 2, 2005
Patent numberCA 1232171 A
Classification (IPC)C23C2/12 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedMay 30, 1985Patent grantedFeb 2, 1988Term endedFeb 2, 2005

Sources & verification

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