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Expired Canadian patentCanada

Low oxygen biologically mediated nutrient removal

CA 2503166 C · Owner: Morris, James W. · Inventors: Northrop, Jere; Morris, James W.

CIPO record

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Abstract From the Canadian patent

The present invention is directed to a substantially odorless biologically mediated treatment process for solid and liquid organic wastes. The present invention also provides for a novel nutrient rich humus material produced from the biologically mediated treatment process. The bioconversion process of the present invention results from low electron acceptor concentrations and high quantities of microorganisms in a diverse microbial community.

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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

  • Filed April 18, 2005 and granted October 16, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 18, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 18, 2005
GrantedOctober 16, 2012
Term endedApril 18, 2025
Patent numberCA 2503166 C
Classification (IPC)C02F3/00

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedApril 18, 2005Patent grantedOct 16, 2012Term endedApril 18, 2025

Sources & verification

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