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Expired Canadian patentCanada

Pollutant adsorption method and apparatus

CA 1111786 A · Owner: Foster Wheeler Energy Corporation · Inventors: Beckman, Eugene B.

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Abstract From the Canadian patent

A method and apparatus for the removal of pollutants from flue gas includes a first adsorber spaced apart from a second adsorber and a flue gas cooling unit located intermediate the two adsorbers. Flue gas is passed through the first adsorber at a preferred temperature range for the efficient adsorption of sulfur trioxide is cooled by the, cooling unit, and is passed through the second adsorber unit at a preferred temperature range for the efficient adsorption of sulfur dioxide and the oxides of nitrogen. By efficiently removing sulfur trioxide in a first adsorber the acid dew point of the flue gas is lowered to a temperature below the preferred temperature range for the efficient …

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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 November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 25, 1978
GrantedNovember 3, 1981
Term endedNovember 3, 1998
Patent numberCA 1111786 A
Classification (IPC)B01D53/06 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedSep 25, 1978Patent grantedNov 3, 1981Term endedNov 3, 1998

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.