Apparatus for inspecting a pipeline for leaks
CA 1111544 A · Owner: Shell Canada Limited · Inventors: Lohman, Robert C.; Van Tilburg, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for automatically adjusting the gain of an acoustic device for inspecting a pipeline for leaks. The acoustic device is designed to pass through the interior of a pipeline and to record noise produced by fluids leaking from the pipeline. The response of the device is adjusted automatically by controlling the gain of the amplification in response to the strength of a signal received from an acoustic generator positioned outside the pipeline.
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
- Granted October 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 1998.
- 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.