Process and apparatus for production of ferric oxide from iron chloride solutions
CA 2226428 A1 · Owner: Ruthner, Michael Johann · Inventors: Ruthner, Michael Johann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process and an apparatus for the production of iron oxides having low chlorideion content comprising charging of a free HCl containing iron chloride solution into a spray roaster with a feeding device and a spray boom for charging the iron chloride containing solution into a reaction chamber heated by combustion gases thermally decomposing the solution into iron oxide, HCl gas and reaction gases a discharging device for the iron oxide and a cooling zone between the burner's focal plane and the discharging device cooling of iron oxide granules to temperatures at less than 450°C reducing the concentration of HCl gas to less than 10 volume percent charging the layer of iron oxide granules …
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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 December 29, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2019.
- 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
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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.