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Expired Canadian patentCanada

Utilization of sulphur dioxide for energy production

CA 1298956 C · Owner: Lin, Ping-Wha · Inventors: Lin, Ping-Wha

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

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Abstract From the Canadian patent

Gases containing high sulphur dioxide concentrations are used for energy production. The steps involve the conversion of sulphur dioxide to sulphur trioxide in a catalytic converter (40, 360 570), the, reaction of sulphur trioxide with lime and/or limestone in a fluidized reactor (60, 410, 580) and, removal of heat from the chemical reactions for utilization in the production of superheated steam. The superheated steam that is produced can be used for the generation of electricity, for operating mechanical devices, space heating, lime production construction materials curing, and heat exchange processes.

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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 April 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 3, 1987
GrantedApril 21, 1992
Term endedApril 21, 2009
Patent numberCA 1298956 C
Classification (IPC)C01B17/76 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 3, 1987Patent grantedApril 21, 1992Term endedApril 21, 2009

Sources & verification

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