Seismic cable device
CA 2072107 C · Owner: SVENNING, BJõRNAR · Inventors: SVENNING, BJõRNAR; Berg, Eivind
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The device comprises instruments for collection and recording of signals in seismic exploration of the substratum off-shore. The device is designed as a pole which is adapted to be forced down into the seabed and comprises a pointed lower end, an intermediate approximately cylindrically-shaped main portion and a, vibration-absorbing spacer between the pointed end and the intermediate main portion. The other end of the intermediate main portion is connected to a top part designed for inserting/pulling, and other ways of handling the device. The pointed end at least comprises geophones and a hydrophone is placed in the vicinity of the upper end of the device. The majority of the device's …
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 October 22, 1990 and granted October 17, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2012.
- 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.