Seismic device
CA 2072098 C · Owner: Den Norske Stats Oljeselskap A.S. · Inventors: Berg, Eivind; SVENNING, BJõRNAR
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Device comprising instruments for the collecting and recording of signals in seismic exploration of the formation off-shore. The intermediate main portion (1), is approximately cylindrically shaped and is connected to a pointed end (2) via a, vibration absorbing spacer (6). The other end of the intermediate main part is connected to a top part designed for insertion/pulling and other ways of handling the, device, where the pointed end at least comprises geophones and a hydrophone is placed in or near the upper end of the device and the other instruments of , the , device are situated in the middle main portion.
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 December 7, 1999. 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.