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Expired Canadian patentCanada

Skid rail

CA 1234978 A · Owner: Cameron Iron Works, Inc. · Inventors: Smith, John S.; Webster, Charles G.; Campbell, Frank, Jr.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A skid rail for a reheat furnace which supports the slabs or work pieces moving therethrough without excessive cooling or tiger striping of such work pieces including a hollow structural member having an upper surface a wear bar having a, plurality of support blocks secured thereto for supporting the wear bar in a position above the upper surface of the structural member, cleats engaging the blocks to secure the wear bar on the surface and insulation under the wear bar and around the blocks and cleats, the material of the wear bar and the blocks having low thermal conductivity and high strength when subjected to the elevated temperatures of the reheat furnace.

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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 April 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 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.
FiledMarch 21, 1985
GrantedApril 12, 1988
Term endedApril 12, 2005
Patent numberCA 1234978 A
Classification (IPC)F27D3/02

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedMarch 21, 1985Patent grantedApril 12, 1988Term endedApril 12, 2005

Sources & verification

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