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Expired Canadian patentCanada

Method for cleansing gas and apparatus herefor (i)

CA 1292426 C · Owner: Gustavsson, Lennart · Inventors: Johansson, Lars-Erik; Lindau, Leif; Gustavsson, Lennart

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

The inventive gas cleansing apparatus comprises a vessel (1) which is partially filled with a liquid bath (32) and which has R gas inlet pipe (12), which leads to a gas distribution means (14) with distribution pipes (18) beneath the surface (34) of the liquid (32). The distribution pipes (18) exhibit inlet orifices (64) for incoming contaminated gas beneath the liquid surface (34) wherefrom, the gas is caused to flow through outlet nozzles for in-, stance venturi nozzles (28), to outlet orifices (31). The outlet orifices (31) are situated at a considerably higher level than the inlet orifices (64). The incoming contaminated gas will because of its inherent higher pressure press down an …

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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 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2008.
  • 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 17, 1987
GrantedNovember 26, 1991
Term endedNovember 26, 2008
Patent numberCA 1292426 C
Classification (IPC)B01D47/02 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedSep 17, 1987Patent grantedNov 26, 1991Term endedNov 26, 2008

Sources & verification

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