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US2420580A
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Magnetometer
Assignee: Standard Oil Development Co
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Filing: 1942-06-15
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Granted: 1947-05-13
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Expires: 1962-06-15
Abstract
No abstract record available.
Inventors
- 👤 Leland L Antes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:35
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/028; G01R33/0283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190022330A
Cited
US1417803A
Cited
US1666309A
Cited
US1630989A
Cited
US1863415A
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US2151627A
Cited
US2288781A
Cited
US2331617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |