US2803798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable magnetometer
Assignee: —
•
Filing: —
•
Granted: 1957-08-20
•
Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:44
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1360326A
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GB207680A
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US1666309A
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US1863421A
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US1951716A
Cited
US1906271A
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US1892826A
Cited
US2114283A
Cited
US2123045A
Cited
US2151627A
Cited
US2338991A
Cited
US2370194A
Cited
US2493779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |