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Expired Canadian patentCanada

Process and apparatus for the anaerobic biological purification of wastewater

CA 1234229 A · Owner: Linde Aktiengesellschaft · Inventors: Fuchs, Uwe; Morper, Manfred

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Abstract From the Canadian patent

PROCESS AND APPARATUS FOR THE ANAEROBIC BIOLOGICAL PURIFICATION OF WASTEWATER" Abstract, In a process for the anaerobic biological purification of wastewater containing organic pollutants the wastewater, to be purified is conducted through two series-connected reactors (2 and 5) operated under anaerobic conditions. In order to achieve a shortening of the residence time for the wastewater to be purified and thereby a savings in total reactor volume, the pollutants contained in the wastewater, which are present partially in the undissolved partially in the macromolecular state and are only slowly metabolizable under anaerobic conditions are retained in, the first reactor (2) by means of a …

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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 15, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 15, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 25, 1984
GrantedMarch 15, 1988
Term endedMarch 15, 2005
Patent numberCA 1234229 A
Classification (IPC)C02F3/28 +1 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedJuly 25, 1984Patent grantedMarch 15, 1988Term endedMarch 15, 2005

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