A method for removing nitrogen oxides, sulfur oxides, and other acid gases from a gas stream
CA 2248679 A1 · Owner: Jensen, Bjarne Henning · Inventors: Bhatia, Vinay K.; Thulstrup, Niels; Iversen, Steen Brummerstedt
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method for removing nitrogen oxides sulfur oxides, and other acid gases , from a gas stream in which an adsorption agent is suspended in the gas stream in a reaction zone wherein these oxides and acid gases are adsorbed by the adsorption agent; whereafter the adsorbent agent is at least partially withdrawn from the reaction zone as an entrained suspension and substantially removed from the gas stream in a separation zone; whereafter the exit gas is discharged to the atmosphere; while separated adsorbent agent is introduced into a regeneration zone where the adsorbed oxides and acid gases are substantially removed and withdrawn in a concentrated form; while the regenerated …
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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 March 11, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2019.
- 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.