Pipe leakage detection
CA 2292562 A1 · Owner: Bg Plc · Inventors: Ashworth, Roger Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A towed pipeline pig for leak detection includes a body (13) with associated seals (23-26) to provide sealed chambers for receiving a test pressure. Fluid can continue to flow through the pipe via central tube (28). An equalisation valve (35) can be closed typically during the leakage check over a pipe joint previously detected by sensors (30-32). A computer (20) provides leakage rate and other parameters.
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 June 3, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2020.
- 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.