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US2485847A
Expired / Lapsed
US
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Combination magnetometer and gradiometer
Assignee: United States Department of the Navy
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Filing: 1944-09-23
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Granted: 1949-10-25
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Expires: 1964-09-23
Abstract
No abstract record available.
Inventors
- 👤 Otto H Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:42
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1787992A
Cited
US1839290A
Cited
GB399957A
Cited
US1968068A
Cited
US2036814A
Cited
US2238072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |