Wastewater biological treatment system and method therefor
CA 2499209 A1 · Owner: The White Oak Partnership, L.P. · Inventors: Hassett, Alan F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A biological treatment system having a wastewater drain field (150) and at least one perforated distribution pipe (52) within the drain field. A perforated outer pipe (80) surrounds the distribution pipe to receive effluent from the distribution pipe and dispense the effluent to the drain field after it has been biologically treated within the outer pipe.
Read the whole patent
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 September 16, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 16, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.