Wastewater treatment system
CA 2343393 A1 · Owner: Aqua Partners, Ltd. · Inventors: Drewery, T. Gig
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wastewater treatment system having a tank (12) with an offset access opening (18) at the top, a frustroconical clarifier compartment (24) within the tank an aeration compartment (34) around the exterior of the clarifier compartment and aerators (36) extending into the aeration compartment. The aerators are positioned below the access opening. The aerators include an inlet (48) a , conduit (50), a diffuser assembly (52) connected to the conduit and an anchor , (54) connected to the diffuser assembly. The diffuser assembly has a plurality of diffusers.
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 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2021.
- 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.