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Expired Canadian patentCanada

Method and apparatus for the treatment of sewage

CA 1102020 A · Owner: Sanilogical Corporation · Inventors: Kinzer, Jay

CIPO record

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

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Abstract From the Canadian patent

Abstract of the Disclosure, A method and apparatus for treating sewage to obtain substantially complete organic matter substrate and biological sludge oxidation prior to effluent discharge in a treatment system comprising a series of treatment units; each unit having a generally circular cross-sectional configuration defining a treatment chamber baffle means in, the treatment chamber for directing the flow of mixed liquor in the chamber, gas supply means for supplying an oxygen containing gas to the treatment chamber so as to cause a continuous semi-circular flow pattern of mixed liquor in the treatment chamber; inlet means for supplying raw sewage to the first unit of the series; outlet …

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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 May 26, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 1998.
  • 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 25, 1978
GrantedMay 26, 1981
Term endedMay 26, 1998
Patent numberCA 1102020 A
Classification (IPC)C02F3/22 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedSep 25, 1978Patent grantedMay 26, 1981Term endedMay 26, 1998

Sources & verification

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