Piezocable based sensor for measuring unsteady pressures inside a pipe
CA 2537800 C · Owner: Engel, Thomas W. · Inventors: Engel, Thomas W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A piezocable based sensor for measuring unsteady pressures inside a pipe comprises a cable wrapped around the pipe and an outer band compressing the cable towards the pipe. The cable provides a signal indicative of unsteady pressure within the pipe in response to expansion and contraction of the pipe. The cable includes: a first electrical conductor a piezoelectric material , disposed around the first electrical conductor a second electrical conductor , disposed around the piezoelectric material and an insulative jacket , surrounding the piezoelectric material and electrical conductors. The cable may be part of an array of cables wrapped around the pipe and a signal , processor may …
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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 August 9, 2004 and granted February 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2026.
- 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.