US3295099A
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Assignee: Mobil Oil AS
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Filing: 1964-01-09
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Granted: 1966-12-27
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Expires: 1984-01-09
Abstract
No abstract record available.
Inventors
- 👤 Philip L Lawrence
- 👤 Robert J Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:36
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V1/36; G01V1/364; G01V1/368; G01V1/30; G01V1/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A SYSTEM FOR INVERSE FILTERING A SEISMOGRAM TO CONVERT IT TO A FUNCTION REPRESENTATIVE OF THE VELOCITY LAYERING OF THE EARTH COMPRISING MEANS FOR CONVERTING SAID SEISMOGRAM TO A TIME VARYING VOLTAGE, AN AMPLIFIER, A SUMMING CIRCUIT CONNECTED BETWEEN SAID MEANS FOR CONVERTING SAID SEISMOGRAM AND THE INPUT TO SAID AMPLIFIER, A FILTER HAVING FREQUENCY RESPONSE CHARACTERISTICS WHICH ARE THE SAME AS THE FREQUNCY RESPONSE OF THE EARTH AND THE INSTRUMENTS USED IN OBTAINING SAID SEISMOGRAM, SAID FILTER BEING CONNECTED BETWEEN THE OUTPUT OF SAID AMPLIFIER AND SAID SUMMING CIRCUIT, THE OUTPUT OF SAID FILTER BEING APPLIED TO SAID SUMMING CIRCUIT WITH A POLARITY PRODUCING NEGATIVE FEEDBACK IN SAID AMPLIFIER.
Claim 2
Independent Claim
110 words
A SYSTEM FOR INVERSE FILTERING A SEISMOGRAM TO CONVERT IT TO A FUNCTION REPRESENTATIVE OF THE VELOCITY LAYERING OF THE EARTH COMPRISING MEANS FOR CONVERTING SAID SEISMOGRAM TO A TIME VARYING VOLTAGE, AN AMPLIFIER, A SUMMING CIRCUIT CONNECTED BETWEEN SAID MEANS FOR CONVERTING SAID SEISMOGRAM AND THE INPUT TO SAID AMPLIFIER, A FILTER HAVING FREQUENCY RESPONSE CHARACTERISTICS WHICH ARE THE SAME AS THE FREQUNCY RESPONSE OF THE EARTH AND THE INSTRUMENTS USED IN OBTAINING SAID SEISMOGRAM, SAID FILTER BEING CONNECTED BETWEEN THE OUTPUT OF SAID AMPLIFIER AND SAID SUMMING CIRCUIT, THE OUTPUT OF SAID FILTER BEING APPLIED TO SAID SUMMING CIRCUIT WITH A POLARITY PRODUCING NEGATIVE FEEDBACK IN SAID AMPLIFIER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |