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Expired Canadian patentCanada

Method of producing molten pig iron or steel pre- products from particulate ferrous material

CA 1268633 C · Owner: Kepplinger, Werner · Inventors: Kepplinger, Werner; Hauk, Rolf

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

In a method of producing molten pig iron or steel preproducts from particulate ferrous material as well as of, producing reduction gas in a melt-down gasifier by adding coal and by blowing in oxygen-containing gas by means of nozzle pipes penetrating the wall of the melt-down gasifier, a fixed bed formed of coke particles through which, the oxygen-containing gas flows and a superposed fluidized bed of coke particles are formed, and the ferrous material is charged onto the fluidized bed. Below the fixed bed through which oxygen-containing gas flows a fixed bed of, coke particles not passed through by gas is provided and, the fluidized bed above the fixed bed passed through by …

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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 May 8, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 8, 2007.
  • 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 14, 1986
GrantedMay 8, 1990
Term endedMay 8, 2007
Patent numberCA 1268633 C
Classification (IPC)C21B5/00 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedMarch 14, 1986Patent grantedMay 8, 1990Term endedMay 8, 2007

Sources & verification

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