Underground conduit defect localization
CA 2292009 C · Owner: Russo, Anthony Peter · Inventors: Russo, Anthony Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method of determining the flow rate and direction of a medium within a conduit. The method is comprised the steps of coupling a pair of sensors to the conduit at a first and second location thereof. A first vibration is imposed upon the conduit at a position proximate a first sensor in the pair of sensors the position being outside of a region located between the pair of sensors which are separated by a distance and mounted to the conduit. A first transmitted vibration is detected propagating along the conduit in response to the imposed vibration at both sensors. The above defined steps are repeated wherein a second vibration is imposed at a second …
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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 September 20, 1995 and granted August 6, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2017.
- 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.