Method for reducing metal oxides and device for implementing said method
CA 2324883 A1 · Owner: Sidmar N.V. · Inventors: Monteyne, Guido
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for reducing metal oxides in an oven with ring-shaped rotary heath wherein a carbon-containing reducer and metal oxides are deposited in a strip on part of said rotary hearth and then transported in a substantially spiralling movement towards an evacuation device. Said method is characterised in that the reducer is preheated and mixed with the preheated metal oxides before and/or while they are deposited on the rotary hearth and in a first reduction phase the carbon-containing reducer volatile constituents (mainly methane and hydrogen) are used to start reducing the metal oxides and in a second reducing phase carbon monoxide is used.
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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 April 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2021.
- 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.