Method and plant for purification of metals from water
CA 2269734 A1 · Owner: Van Roy, Sandra · Inventors: Diels, Ludo; Spaans, Piet Hein; Wouters, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is related to a, purification method of metal(s) containing water wherein : - the process is fully continuous, - the water flows through a sand filter inoculated with, viable micro-organisms - a part of the micro-organism biomass loaded with metals, is evacuated, and, - the micro-organism biomass loss is equal to the micro-organism biomass growth.
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 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2021.
- 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.