Aeration of liquids
CA 2090619 A1 · Owner: Jameson, John Graeme · Inventors: Jameson, John Graeme
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and apparatus for the aeration of liquids typically for, wastewater treatment or pollution control. Liquid is introduced into the top end of a vertical pipe (3) having its lower end immersed in a body of liquid (4) through a nozzle (2) forming a downwardly moving jet (8). The jet entrains air (for example through inlet (6)) forming a mixture of fine bubbles which issues from the lower end (5) of the conduit into the body of liquid. A diffuser plate (10) may be provided to disperse the bubbles in the body of liquid and draft tubes may be provided within the pipe to control the jet and the formation of bubbles.
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 August 27, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 2013.
- 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.