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Expired Canadian patentCanada

Water treatment

CA 2563455 C · Owner: Jones, Gerald · Inventors: Jones, Gerald; Fry, John

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

An apparatus for the biological treatment of saltwater-based domestic wastewater, the apparatus having an inlet for the introduction of the saltwater-based domestic wastewater, an outlet for the removal of treated wastewater, means for monitoring the salinity level of the saltwater-based domestic wastewater entering or within the apparatus and means for controlling the salinity level of the saltwater-based domestic wastewater entering or within the apparatus such that fluctuations in the salinity level of the saltwater-based domestic wastewater are reduced and the biological treatment of the saltwater-based domestic wastewater is thereby maintained.

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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 7, 2005 and granted November 20, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 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 7, 2005
GrantedNovember 20, 2012
Term endedApril 7, 2025
Patent numberCA 2563455 C
Classification (IPC)C02F3/02

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedApril 7, 2005Patent grantedNov 20, 2012Term endedApril 7, 2025

Sources & verification

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