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Expired Canadian patentCanada

Method for the operation of a plant in which sulphur oxides are accepted in combination with a plant for the conversion of sulphur dioxide

CA 1059731 A · Owner: Shell Internationale Research Maatschappij B.V. · Inventors: Taubert, Friedrich C.; Groenendaal, Willem

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method is provided for the operation of a first plant in which sulphur oxides are accepted from gases or gas mixtures on solid acceptors and subsequently released again by regeneration of the acceptors, in combination with a second plant for the conversion of sulphur dioxide; the first plant comprises at least two reactors which are alternately used for the acceptance of sulphur oxides and subsequent regeneration of the loaded acceptors yielding a regeneration off-gas with varying sulphur dioxide content; in order to obtain a constant or substantially constant sulphur dioxide gas stream to the second plant for the conversion of sulphur dioxide, the regeneration off-gas after cooling and …

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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 August 7, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 7, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedAugust 7, 1979
Term endedAugust 7, 1996
Patent numberCA 1059731 A
Classification (IPC)B01D53/34 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedAug 7, 1979Term endedAug 7, 1996

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