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Expired Canadian patentCanada

Apparatus for aerobic treatment of activated sludge

CA 1068018 A · Owner: Bayer Aktiengesellschaft · Inventors: Bruch, Werner; Guth, Hans; Kuhn, Helmut

CIPO record

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Abstract From the Canadian patent

Abstract of the Disclosure, In an apparatus for the gasification of a biomass in an aqueous medium in the presence of organic substances degradable by the biomass, comprising a gasification tank and a, clearing chamber for the gasified water-containing biomass provided concentrically around the gasification tank the gasifi-, cation tank communicating with the clearing chamber through an inlet in the latter, the improvement wherein a) the gasification tank is from about 10 to 32 meters high, has a height/diameter ratio between approximately 40 and 0.2, is provided adjacent its floor with gas inlet points and, is connected via inlet pipes to at least one gas removal and flocculation cyclone;, …

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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 December 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 11, 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—
GrantedDecember 11, 1979
Term endedDecember 11, 1996
Patent numberCA 1068018 A
Classification (IPC)C02F3/12 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedDec 11, 1979Term endedDec 11, 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.