Improved method for beneficiating titanium-bearing material containing iron
CA 2136299 A1 · Owner: Ericson, Aake Sandor · Inventors: Zander, Bo Haarry; Reeves, James William; Ericson, Aake Sandor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for beneficiating particulate titanium-bearing material containing iron oxides comprising: (a) contacting in a mechanical reduction kiln, particulate titanium-bearing material particulate carbonaceous reducing material and HCl or one or more, materials which will produce HCl during step (a) or mixtures thereof, said contacting taking place in the substantial absence of titanium chlorination and while (i) the mechanical reduction kiln turns and cascades the material therein, (ii) a temperature of about 900-1100 degrees C is maintained, and (iii) reducing conditions are maintained, said particulate titanium bearing material having a mean diameter of less than about 40 microns which …
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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 May 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 2015.
- 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.