Method for making metal oxide agglomerates
CA 2405951 A1 · Owner: Sugiyama, Takeshi · Inventors: Sugiyama, Takeshi; Tetsumoto, Masahiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for making metal oxide agglomerates includes the steps of: preparing a mixed material by adding water and an acidic substance to metal refinery waste including metal oxide which is the main component, a carbonaceous substance in an amount sufficient for reducing the metal oxide and, 0.7 percent by mass or more of an alkali metal on a dry basis; and agglomerating the mixed material to form green agglomerates. The green agglomerates are then dried with a dryer to obtain dry metal oxide agglomerates exhibiting a high strength.
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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 September 30, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2024.
- 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.