System for the internal inspection of pipelines
CA 1261938 A · Owner: Akademiet For De Tekniske Videnskaber, Svejsecentralen · Inventors: Lund, Svend A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for the internal inspection of pipelines for carrying oil or gas, subsea or overland, includes an apparatus carrier pressure-, driven or self-propelled, carrying non-destructive examination apparatus moved through the pipeline to inspect the safety conditions of the pipeline wall material and surfaces. During its progression the carrier gradually deposits one or more expendable thin optical fibres inside, the pipeline. the fibres connect the carrier with a control station situated outside the pipeline at the carrier launching end of the pipeline, through electro-optical signal converters installed in the carrier and in the control station. The system permits continuous on-line …
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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
- Granted September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.