Pipeline inspection pigs
CA 2459255 A1 · Owner: Pii Limited · Inventors: Smith, Ian; Mann, Andrew; Paige, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pipeline inspection pig for locating crack-like defects (10) in pipeline walls (8) comprises at least one transmit transducer (T) for transmitting ultrasound energy into the pipeline wall (8) and at least one associated , receive transducer (R) located adjacent the transmit transducer (T) the , arrangement being such that, for a given defect (10) in the pipeline wall (8) ultrasound energy within the pipeline wall (8) is incident on the defect (10) part of said energy being reflected by the defect (10) back to the receive transducer (8) in the form of a first data stream and the remainder of said , energy passing through the defect (10) to be attenuated thereby and thence returned to …
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 September 3, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 3, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 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.