Method for attenuation of reverberations using a pressure-velocity bottom cable
CA 2255631 C · Owner: Moldoveanu, Nicolae · Inventors: Moldoveanu, Nicolae
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A method is described that attenuates reverberations in ocean bottom cable data used to generate a seismic profile. First a seismic wave is generated , and recorded by pressure and particle velocity sensor pairs. Adding the product of the pressure data times the absolute value of the velocity data and the product of the velocity-data times the absolute value of the pressure data eliminates-reverberations, leaving a combined signal that is a function of only the primary wave response signal. Dividing this combined signal by 2 and a sensitivity scaling factor, and then taking the square root of the result produces the magnitude of the primary signal. Replacing the positive/negative …
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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 April 24, 1997 and granted September 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2019.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.