Psa plant using valves having long and heterogeneous operating times
CA 2286885 A1 · Owner: Torre, Yves · Inventors: Sun, Lian-Ming; Rouge, Dominique; Chantagrel, Stephane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a PSA, especially VSA plant for separating a gas stream, operating in a production cycle and comprising at least one adsorber preferably two or three adsorbers, and several valves having long and heterogeneous operating times. More specifically the average operating time, (µ) of the valves is such that: 0.5 s < µ < 2 s and the operating time (.DELTA.t) of each of the valves is such that: µ - x < .DELTA.t < µ + x, with 0.1 s < x < 0.5 s. The invention also relates to the use of such a PSA plant for producing a gas stream rich in oxygen in, nitrogen or in hydrogen, particularly a stream comprising more than 80% oxygen, which is then sent to an oxygen-consuming plant …
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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 October 15, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2021.
- 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.