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Expired Canadian patentCanada

Regeneration of a scrubbing agent

CA 1296702 C · Owner: Becker, Hans · Inventors: Sporer, Josef; Becker, Hans

CIPO record

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Abstract From the Canadian patent

12-, Abstract of the Disclosure, For regeneration of a loaded scrubbing agent e.g. a polyethylene glycol ether containing H2O and sour gases, the regeneration is conducted in a regeneration column equipped with a bottom heater and an overhead condenser, by stripping with vapor, e.g. stream provided by the heater vaporizing an aqueous condensate. After condensation of the vapor in the condenser the stripped, components are removed and the remaining condensate is recycled directly or indirectly to the bottom part of regeneration column to avoid mixing the aqueous condensate with the loaded solvent. The condensate is fed directly into the bottom of the column or is fed into the line between …

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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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.
FiledAugust 7, 1987
GrantedMarch 3, 1992
Term endedMarch 3, 2009
Patent numberCA 1296702 C
Classification (IPC)B01D3/38

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedAug 7, 1987Patent grantedMarch 3, 1992Term endedMarch 3, 2009

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