Marine seismic surveying
CA 2399645 A1 · Owner: Richardson, Michael · Inventors: Canter, Peter H.; Vigen, Erik; Richardson, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a new method and apparatus for performing a marine seismic survey an array , of parallel seismic streamers (16) containing hydrophones (32) is towed by a survey vessel (10). At least one tailbuoy (46) provided with a GPS receiver (50) is towed by the array, which has a network of acoustic emitters (40) and receivers distributed throughout it for determining the respective positions of the hydrophones with respect to the GPS receiver. To improve the accuracy of the position determinations, at least one further buoy (52) provided with a GPS receiver (58) is connected to be towed by the array from a point somewhere near the forward end of the array, and the positions of at least some …
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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
- Filed January 19, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 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.