US3114876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic anomaly detection apparatus with permanent magnet means
Assignee: Schlumberger Well Surveying Corp
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Filing: 1959-04-06
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Granted: 1963-12-17
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Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 Nick A Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:47
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26; E; E21; E21B; E21B47/00; E21B47/09; E21B47/092
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
APPARATUS FOR DETECTING MAGNETIC ANOMALIES IN AN OBJECT COMPRISING MAGNET MEANS GENERATING A FLUX FIELD PASSING THROUGH THE OBJECT, POLE PIECE MEANS AT ONE POLE OF THE MAGNET MEANS HAVING ELEMENTS PROVIDING AT LEAST TWO MAGNETIC FLUX PATHS BETWEEN THAT POLE OF THE MAGNET MEANS AND THE OBJECT, AND AT LEAST TWO COILS IN THE POLE PIECE MEANS LINKING THE MAGNETIC FLUX PASSING THROUGH ELEMENTS PROVIDING DIFFERENT ONES OF THE PATHS AND CONNECTED IN OPPOSED RELATION.
Claim 2
Dependent Claim
76 words
APPARATUS FOR DETECTING MAGNETIC ANOMALIES IN AN OBJECT COMPRISING MAGNET MEANS GENERATING A FLUX FIELD PASSING THROUGH THE OBJECT, POLE PIECE MEANS AT ONE POLE OF THE MAGNET MEANS HAVING ELEMENTS PROVIDING AT LEAST TWO MAGNETIC FLUX PATHS BETWEEN THAT POLE OF THE MAGNET MEANS AND THE OBJECT, AND AT LEAST TWO COILS IN THE POLE PIECE MEANS LINKING THE MAGNETIC FLUX PASSING THROUGH ELEMENTS PROVIDING DIFFERENT ONES OF THE PATHS AND CONNECTED IN OPPOSED RELATION.
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) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |