Water treatment process
CA 2270894 A1 · Owner: Thocar Ltd. · Inventors: Delighiannis, Andreas Th.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the treatment of waste waters containing chemically reducible dissolved organic and inorganic pollutants and suspended matter in particulate or colloidal form. The process comprises contacting the water with metallic iron or ferrous ions (Fe2+), or mixtures thereof in the presence of promoter , metals, such as Cu Pd, Pt, Au, Ag, and Ni, or oxides, sulfides and other insoluble compounds of these metals, which catalyze the redox reductions carried out by the iron or ferrous reagents. The production of ferric ions (Fe3+) as a final iron oxidation product allows for the simultaneous coagulation and precipitation of suspended colloidal and particulate solids out of the …
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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 November 7, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 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
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.