Floating aerator arrangement
CA 2034086 C · Owner: Von Nordenskjold, Reinhart · Inventors: Von Nordenskjold, Reinhart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the embodiments described in the specification a, floating aerator for the introduction of air into a body of water such as an activated sludge plant having at least one air supply line extending along the surface of the water with aerators suspended below the surface of the water has floats, mounted on the air supply line and branch air lines extending from the air supply line through each float to a suspended aerator. Each air supply line is a continuous line extending through the floats and the floats are made of two preformed interlocking, buoyant sections.
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 January 11, 1991 and granted November 26, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 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.