Centrifugal reverse-osmosis desalination unit incorporating an annular membrane cartridge
CA 2178118 C · Owner: Hopkin, David A. · Inventors: Moilliet, Antony; Hopkin, David A.; Wild, Peter M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an apparatus for separating an original feed solution such as sea-water, into a product solution of decreased concentration (relatively fresh water) and an exhaust, solution of increased concentration. The apparatus includes an annular reverse osmosis, membrane means, contained in an annular pressure vessel that is housed in a rotor assembly. The, rotor is arranged to spin on an axle and is located within an evacuated shroud. The apparatus, further includes supply means for supplying the original feed solution to the reverse osmosis, membrane, exhaust means at an outermost radius of the reverse osmosis membrane for removing, the exhaust solution from 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 June 4, 1996 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2018.
- 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.