Method and device for water-airing
CA 1268566 C · Owner: Petersen, Fred · Inventors: Petersen, Fred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus for restoring bodies of water by artificial aeration of the deep water (the hypolimnion), whereby the natural stratification of the water is maintained and no compressor is required. In the method a pump draws the deep water in and forces it through an ejector which, in turn, drawn air from the atmosphere and mixes it, in the form of finely divided bubbles with the, water. The mixture of water and air is injected into a riser-pipe in which the ascending air-bubbles produces an upwardly directed vertical flow, additional deep water being drawn in through the opening at the bottom of the riser-pipe and being brought into contact with the air-bubbles. At the top, …
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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
- Granted May 1, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 2007.
- 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.