Single bed pressure swing adsorption process for recovery of oxygen from air
CA 2189598 C · Owner: Fassbaugh, John Harry · Inventors: Aaron, Timothy Mark; Schaub, Herbert Raymond; Fassbaugh, John Harry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure swing adsorption process for the recovery of oxygen from air whereby the adsorbent bed within an adsorbent vessel is depressurized to an intermediate pressure by releasing void space gas from the product end of the vessel to a low purity oxygen tank while concurrently evacuating the adsorbent vessel from the feed end.
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 November 5, 1996 and granted August 21, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 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.