System for removing volatile impurities from ground water
CA 2025385 C · Owner: Ieg Industrie-Engineering Gmbh · Inventors: Bernhardt, Bruno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the system for removing volatile impurities from ground water by the generation of under-pressure within a well shaft that is driven into the area of ground water that is contaminated, a vertical flow of the ground water within the shaft itself and in the surrounding ground is enhanced by means of a suction pump within the shaft. The output of this pump is controllable. In addition, purification gas is introduced through a feed channel below the ground water plane. After rising through the ground water the gases are, drawn off above the ground water plane and passed to a multistage filter system that incorporates connections to the feed pipe for the gases into the shaft. By this means …
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 September 14, 1990 and granted October 25, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2012.
- 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.