Process for lowering the phosphorous content of waste water
CA 2115353 A1 · Owner: Lumetzberger, Rudolf · Inventors: Schwabegger, Johann; Lumetzberger, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to a process for lowering the phosphorus content of waste water, the waste water flows in a purification circuit through individual conditioning basins, such as a preliminary sedimentation basin (6), an activation basin (7) final sedimentation basin, (8) or the like. In order to reduce the phosphorus content in a rational, ecological and efficient manner the waste water is, subjected to an electrolysis in one of the conditioning basins preferably in the activation basin (7) by means of metal electrodes , (12) and of an electric direct voltage.
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 June 30, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2015.
- 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.