US3263161A
Expired / Lapsed
US
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Method for determining depth and falloff rate of subterranean magnetic disturbances utilizing a plurality of magnetometers
Assignee: CAE Electronics Ltd
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Filing: 1963-03-26
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Granted: 1966-07-26
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Expires: 1983-03-26
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Ruddock
- 👤 Howard A Slack
- 👤 Breiner Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:13
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/087; G01V3/15; G01V3/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF DETERMINING THE DEPTH Z AND FALL-OFF RATE N OF A SUBTERRANEAN MAGNETIC DISTURBANCE BELOW AN AREA TO BE SURVEYED, COMPRISING: DETERMINING THE MAGNETIC INTENSITY H AND THE VERTICAL GRADIENT $H/$Z OF THE EARTH''S MAGNETIC FIELD FOR AT LEAST TWO POINTS OF SUBSTANTIALLY CONSTANT ELEVATION LYING WITHIN THE AREA TO BE SURVEYED; LOCATING THE HORIZONTAL COORDINATES X, Y OF SAID POINTS WITH RESPECT TO THE CENTER OF SAID SUBTERRANEAN DISTURBANCE; CONSTRUCTING AT LEAST ONE PROFILE OF THE TOTAL FIELD H; DETERMINING THE HORIZONTAL SPACE DERIVATIVES $H/$X, $H/$Y FROM THE SLOPE OF SAID PROFILE AT SAID
Claim 2
Independent Claim
97 words
THE METHOD OF DETERMINING THE DEPTH Z AND FALL-OFF RATE N OF A SUBTERRANEAN MAGNETIC DISTURBANCE BELOW AN AREA TO BE SURVEYED, COMPRISING: DETERMINING THE MAGNETIC INTENSITY H AND THE VERTICAL GRADIENT $H/$Z OF THE EARTH''S MAGNETIC FIELD FOR AT LEAST TWO POINTS OF SUBSTANTIALLY CONSTANT ELEVATION LYING WITHIN THE AREA TO BE SURVEYED; LOCATING THE HORIZONTAL COORDINATES X, Y OF SAID POINTS WITH RESPECT TO THE CENTER OF SAID SUBTERRANEAN DISTURBANCE; CONSTRUCTING AT LEAST ONE PROFILE OF THE TOTAL FIELD H; DETERMINING THE HORIZONTAL SPACE DERIVATIVES $H/$X, $H/$Y FROM THE SLOPE OF SAID PROFILE AT SAID
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |