Aerating wastewater for re-use
CA 2598524 C · Owner: Weissman, Jeremy · Inventors: Weissman, Jeremy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for aerating a liquid particularly for aerating water , in a wastewater treatment process by: introducing the liquid into a primary pressurizable aeration tank; pumping liquid from the primary pressurizable aeration tank into a secondary pressurizable aeration chamber via a feed path; aerating the liquid in the secondary pressurizable aeration chamber; and recirculating aerated liquid from the secondary pressurizable aeration chamber back to the primary pressurizable aeration tank via a return path. The return path has a cross-sectional area smaller than that of the feed path through which the liquid is pumped into the secondary pressurizable aeration chamber …
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 February 22, 2006 and granted December 30, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 22, 2026.
- 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.
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.