Treatment of gas mixtures
CA 1290923 C · Owner: Langley, Philip E. · Inventors: Langley, Philip E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CO2 is separated from a gas which contains CO2 by dividing the gas into at least two parts and feeding at least two of the said parts into at least two CO2 absorption zones through which a liquid absorbent for CO2 is flowed in series countercurrently to the gas, recovering the gas from the said zones after reduction of its CO2 concentration recovering liquid, absorbent from the last zone and recycling it directly or indirectly to the first absorption zone after removal of CO2 from it.
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
- Granted October 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2008.
- 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.