Process and devices for characterising ground water measurement points by distinguishing ground water from subterranean water accumulation
CA 2254792 C · Owner: Ufz-Umweltforschungszentrum Leipzig-Halle Gmbh · Inventors: Nestler, Wolfgang; Treutler, Hanns-Christian; Dehnert, Joerg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process and devices are disclosed for characterising ground water measurement points by distinguishing ground water from subterranean water accumulation, and are useful in particular for determining the optimum pumping times of ground water measurement points for representative quality tests and for recognising and localising defects in ground water measurement points. The invention is based on the measurement of radon activity concentration or the total activity concentration of ground water samples. Measuring concentrations off-line or on-line makes it possible to reliably determine the ratio from ground water to subterranean water accumulation in a ground water measurement …
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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 May 14, 1997 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 2019.
- 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
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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.