Device and process for cleaning waste water
CA 2037083 A1 · Owner: Environics Ltd. · Inventors: Eertink, Bastiaan B. B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for cleaning waste water includes at least one multireactor, which consists of a cylindrical container, the axis of which is vertical and a rotatable, central shaft coaxially positioned within the container. In the multireactor at least two bioreactors are, positioned above one another and above said bioreactors, there is at least one device for separating sludge and water. The two adjacent bioreactors are separated from each other by means of a horizontal mainly annular partition wall, the outer edge of which is connected to the inner wall of the container, and the inner diameter is somewhat larger than the outer diameter of the shaft. A supply of oxygen gas is provided in 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 February 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2013.
- 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.