Process and device for recovery of metal oxides
CA 2380136 A1 · Owner: Andritz Ag · Inventors: Lebl, Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for recovery of metal oxides from metallic salts in solutions containing these metals preferably also, extracting or recovering the acids comprising spray roasting of these, solutions. It is mainly characterised by spray roasting being performed in at least two stages, where at least one evaporation stage follows at least one conversion stage. In addition, the invention relates to a device for implementing the process.
Read the whole patent
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 4, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 4, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 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.