Tidal vertical flow wastewater treatment system and method
CA 2489638 A1 · Owner: Austin, David C. · Inventors: Austin, David C.; Lohan, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wastewater treatment system (10) includes in serial fluid communication, a , first lagoon (11a) a first vertical flow marsh cell (12a) a second lagoon , (11b), and a final marsh cell (12c). with process recycle from the final cell to the first lagoon. The lagoons function essentially aerobically and both , the lagoons and the marsh cells contain plant roots (20 291) contacting , incoming water. A tidal vertical flow system (10.Dot. 10.Dot.) has atleast three marsh cells (12a'-12c') in serial forward fluid communication incoming , wastewater channeled to at least the first two cells and a portion of water , exiting a final cell recycled. Each cell is alternately flooded and drained for …
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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 June 17, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 17, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2025.
- 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.