Patent US3094658A successfully refreshed from Google Patents.
US3094658A
Expired / Lapsed
US
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Logging system using electrostatically shielded coils
Assignee: Halliburton Co
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Filing: 1959-03-17
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Granted: 1963-06-18
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Expires: 1979-03-17
Abstract
No abstract record available.
Inventors
- 👤 Frank R Bravenec
- 👤 Jr Richard H Huddleston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:51
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26; G01V3/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
IN AN INDUCTION WELL LOGGING SYSTEM WHEREIN A TRANSMITTER COIL INDUCES AN EDDY CURRENT IN FORMATIONS AND SAID EDDY CURRENT INDUCES A VOLTAGE IN A RECEIVER COIL, A LOGGING LINE FOR TRANSMITTING A SIGNAL DERIVED FROM SAID RECEIVER COIL, SAID LOGGING LINE HAVING A GROUNDED OUTER SHEATH, A SEPARATE ELECTROSTATIC SHIELD SURROUNDING EACH OF SAID TRANSMITTER AND RECEIVER COILS, EACH OF SHEILDS BEING CONNECTED BY A SEPARATE WIRE TO A COMMON GROUND POINT ON SAID SHEATH.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |