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Expired Canadian patentCanada

Procedure for microbiological transformation of sulphur containing harmful components in exhaust gases

CA 1302930 C · Owner: Glanzstoff Austria Gesmbh · Inventors: Kloimstein, Lothar; Schmidt, Alfred; Niedermayer, Erwin

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Abstract From the Canadian patent

A biological conversion process is provided for degradation of sulfur-containing pollutants such as H2S CS2, COS, and also, organic sulfur compounds such as thio-alcohols thio-ethers, and, thiophenes in waste gas. A packed reactor is provided which has packing material covered with immobilized microorganisms of the family of Thiobacillaceae and which are continuously kept moist so, that metabolic products of the microorganisms are dissolved in the moisture and discharged continuously. A continuous concentration gradient for sulfate ions thereby results in the reactor or in the region of the microorganisms, these sulfate ions being neutralized in a second reactor by supplying lye (soda or …

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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 June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 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.
FiledOctober 19, 1988
GrantedJune 9, 1992
Term endedJune 9, 2009
Patent numberCA 1302930 C
Classification (IPC)B01D53/34 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedOct 19, 1988Patent grantedJune 9, 1992Term endedJune 9, 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.