Sewage water pumping station, and a tank therefor
CA 2115181 C · Owner: Pettersson, Nils-Erik · Inventors: Pettersson, Nils-Erik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The tank has vertical walls joined to a horizontal bottom with a diagonal wall bridging between an intermediate portion of one of the vertical walls and the, bottom. The diagonal wall has an access opening formed therein, and it cooperates with the one vertical wall and the bottom to form a sheltering recess, in the tank for pumping station components. The, pumping station has the relevant components emplaced in the tank, and sewage water admitting and discharging facility, with a submersible pump and water-handling, piping. Station components and portions, thereof, are sheltered in the recess of the tank, to accommodate an optimum water flow in the tank, and to minimize an, entanglement of …
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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
- Filed February 8, 1994 and granted December 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2016.
- 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.