Metal oxide reduction method and device therefor
CA 2379267 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 a ring-shaped rotary hearth furnace wherein a carbonaceous reducing agent and metal oxides are deposited on a strip over part of said rotary hearth and then transported in a substantially helical motion towards a discharge device. Said method is characterised in that part of the reducing agent is preheated and mixed with the preheated metal oxides before and/or during the deposit in the form a mixture on the rotary hearth and a second part of the carbonaceous reducing agent and carbon monoxide are used for reducing the metal oxides.
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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 July 28, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 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.