Apparatus for producing quality steel directly from iron ores
CA 2024237 A1 · Owner: Peterson, Oren V. · Inventors: Peterson, Oren V.; Peterson, Oren V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The apparatus of the present invention is for producing quality steel directly from iron ores with reducing gas. The apparatus comprises three vessels: (1) a primary reduction vessel, (2) a reducing gas production vessel and (3) a secondary or final reduction vessel. (3) is a high temperature vessel having two hoppers at the top, one into which the partially reduced iron ores are introduced by a conveyor from the bottom of vessel (1), and the other for holding the iron ores and slag ingredients. Molten steel and slag floating on it collect in the bottom where they are held prior to batch withdrawal. Conduits are provided in the wall of vessel (3) (a) to withdraw molten steel and (b) to …
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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
- Filed August 29, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 29, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.