Seismic detection method and apparatus
CA 1237807 A · Owner: Schlumberger Canada Limited · Inventors: Jullien, Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Seismic detection apparatus in accordance with the invention comprises a seismic pick-up made of one or more geophones, a damping resistance, and an amplifier wherein said, damping resistance is essentially constituted by a resistance connected in series between the said pick-up and said amplifier. In a preferred embodiment, the damping resistance is made of two equal resistances, one of which is connected in series with the positive input of the amplifier while the other one is connected in series with the negative input of the amplifier. A seismic detection method in accordance with the invention in which the electrical signals generated by a pickup made of one or more geophones connected …
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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
- Granted June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
- 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.