Process of producing quality steel directly from iron ores
CA 2024236 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 present invention is a process of producing quality steel directly from iron ores with reducing gas. Preferable the iron ores are partially reduced in a primary reduction vessel by the reducing gas which is produced in a gas production vessel and the secondary reduction to molten steel takes place in a third high temperature vessel into the top of which the partially reduced iron ores are introduced, preferably with slag ingredients, and in the bottom of which the molten steel with a, layer of slag floating on it, is held prior to batch withdrawal. The molten steel bath may be carbonaceous or oxidizing as produced but if it is carbonaceous it must be converted to oxidizing before …
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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.