Acoustic emitters for use in marine seismic surveying
CA 2409710 A1 · Owner: Schlumberger Canada Limited · Inventors: Austad, Peter Kongsli; Rustad, Rolf; Borgen, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acoustic emitter for coupling in series in a marine seismic streamer is provided with an annular housing and an annular piezoelectric emitting element positioned coaxially within the housing. This form of construction permits the electrical or electro-optical transmission line which normally runs along the axis of the streamer to pass through the centre of the emitting element while , also permitting the emitter to be spooled with the streamer.
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 May 1, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 1, 2023.
- 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.