Method and device for monitoring underground installations
CA 2438570 A1 · Owner: Kretzschmar, Axel · Inventors: Kretzschmar, Axel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method and device for monitoring underground installations, which are flown through such as tunnels, passages, canals or , the like by detecting and evaluating, in an at least section-by-section manner, changing physical and/or chemical properties along the entire length of the installations to be monitored, whereby a signal is released once a permissible quantity is exceeded. The aim of the invention is to provide a method for monitoring underground installations that enables a high degree of reliability with an economically justifiable cost. In particular a quick and , locally precise localization should be made possible. Simple and tough detectors can be …
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 February 1, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 1, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2024.
- 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.