US3136943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geophysical prospecting method utilizing the electric field component of the earth's natural transient electromagnetic fields
Assignee: New Jersey Zinc Co
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Filing: 1956-04-30
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Granted: 1964-06-09
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Louis B Slichter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:43
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/082
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
A METHOD OF GEOPHYSICAL PROSPECTING COMPRISING CARRYING OUT MEASUREMENTS OF AT LEAST THE ELECTRIC FIELD COMPONENT OF THE NATURAL TRANSIENT ELECTROMAGNETIC FIELDS OF AT LEAST ONE FREQUENCY AT A PLURALITY OF POINTS WITHIN AN AREA TO BE INVESTIGATED IN A MANNER TO DETECT ANY TIME INDEPENDENT SPATIAL VARIATIONS IN AT LEAST THE ELECTRIC FIELD COMPONENT OF SAID TRANSIENT ELECTROMAGNETIC FIELDS, AND RECORDING SUCH SPATIAL VARIATIONS DETECTED.
References Cited (Backward Citations)
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Cited
US2201256A
Cited
US2559586A
Cited
US2623097A
Cited
US2677801A
Cited
US2931974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |