US3588800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determining characteristics of earth formations
Assignee: Atlantic Richfield Co
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Filing: 1968-04-03
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Granted: 1971-06-28
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Expires: 1988-04-03
Abstract
Abstract A METHOD OF AND APPARATUS FOR DETERMINING CHARACTERISTICS OF EARTH FORMATIONS. A PULSE OF ACOUSTIC ENERGY IS PASSED FROM AN ELECTROACOUSTIC TRANSMITTER, THROUGH THE EARTH FORMATION, TO AN ELECTROACOUSTIC RECEIVER. THE RECEIVED SIGNAL IS APPLIED TO A SPECTRUM ANALYZER WHICH PRODUCES A SPECTRUM INDICATIVE OF THE AMPLITUDES OF THE DIFFERENT FREQUENCY COMPONENTS WITHIN THE RECEIVED SIGNAL. THIS FREQUENCY SPECTRUM CAN BE RECORDED FOR FURTHER ANALYSIS.
Inventors
- 👤 Edward J Moore
- 👤 Kantilal P Desai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:47
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; G01V1/48; G01V1/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |