Process for the preparation of vanadyl/vanadous sulphate crystal products or solutions
CA 2354918 C · Owner: Dormehl, Andries Gerhardus · Inventors: Strydom, Ivan; Dormehl, Andries Gerhardus; Monaghan, Patrick Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the crystallisation and re-establishment of a vanadyl/vanadous sulphate solution to its original chemical composition and also the use of a vanadium bearing ore material in particular a titaniferous magnetite ore material for producing the vanadyl/vanadous sulphate solution or crystals particularly for use as an electrolyte in a vanadium radox battery are disclosed.
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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 August 10, 2001 and granted August 9, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2023.
- 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.