Process for producing oxygen by adsorption separation from air
CA 2054199 A1 · Owner: Hay, Leon · Inventors: Hay, Leon; Rottner, Thomas; Eteve, Sylvie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of adsorption separation of gases of the kind which regenerates the adsorbant by pressure variation and uses two adsorbers wherein the recompression stage includes at least one recompression stage using the oxygen produced and a final recompression stage up to the high point of the cycle pressure using air intake without draw-off; and wherein the pressure high-point of the cycle is selected between 1.2 and 2 x 10<5> Pa and the pressure low-point is selected between 0.3-0.7 x 10<5> Pa at least the final part of the desorption stage being carried out by pumping. The method is essentially relevant to the production of oxygen.
Read the whole patent
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 1, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 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.