Selective adsorption process
CA 1270208 C · Owner: The British Petroleum Company P.L.C. · Inventors: Maunders, Barry M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nitrogen and oxygen are separated from air by contacting the air with a bed of MFI type zeolite in an adsorption stage to selectively adsorb the nitrogen and produce an effluent enriched in oxygen and thereafter recover a gas enriched in nitrogen in a desorption stage. The process is preferably a pressure swing process, desorption being effected by pressure reduction. Preferably the MFI zeolite is employed in the sodium or lithium form.
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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
- Granted June 12, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 2007.
- 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.