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Patent US2447849A successfully refreshed from Google Patents.
US2447849A
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Magnetometer
Assignee: Shell Development Co
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Filing: 1944-12-26
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Granted: 1948-08-24
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Expires: 1964-12-26
Abstract
No abstract record available.
Inventors
- 👤 Charles H Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:49
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/28; G01R; G01R33/00; G01R33/02; G01R33/028; G01R33/0283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1863415A
Cited
US1938184A
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US2147492A
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US2123045A
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US2151627A
Cited
US2406870A
Cited
US2420580A
Cited
US2364474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |