Method and apparatus for treatment of organic matter-containing wastewater
CA 2367911 A1 · Owner: Maekawa, Takaaki · Inventors: Maekawa, Takaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a novel method for treatment of wastewater containing organic contaminant materials by oxidatively decomposing the contaminant materials by a radical reaction involving hydroxyl radicals. The method comprises passing the wastewater through a wastewater treatment conduit (6) comprising a straightly tubular member (6) and a radical generating part consisting of a truncated pyramidal or conical tubular member (1) having an inner surface layer of titanium dioxide to serve as a positive electrode and connected to the upstream end of the straightly tubular member and a negative electrode rod (4) coaxially held relative to the truncated tubular member and applying a pulsed DC …
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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 March 3, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 3, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2022.
- 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.