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Expired Canadian patentCanada

Apparatus for soaking steel pieces

CA 1234976 A · Owner: Kabushiki Kaisha Itoh Seitetsusho · Inventors: Tabuchi, Seigo

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

An apparatus for soaking steel pieces including cold steel pieces and hot steel pieces. The apparatus is of the type which includes: a soaking furnace for subjecting the steel pieces to a soaking treatment; a preheating chamber for preheating the cold steel pieces before the cold steel pieces are introduced into the soaking furnace the, preheating chamber being connected to the soaking furnace for receiving waste heat from the soaking furnace for the preheating treatment and having an outlet portion for discharging the cold steel pieces; and a mechanism for introducing the steel pieces into the soaking furnace and for advancing the steel pieces through the soaking furnace. The soaking …

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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.
FiledJanuary 4, 1985
GrantedApril 12, 1988
Term endedApril 12, 2005
Patent numberCA 1234976 A
Classification (IPC)F27B9/02 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJan 4, 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.