US2825977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetometer compass
Assignee: Individual
•
Filing: 1953-02-11
•
Granted: 1958-03-11
•
Expires: 1973-02-11
Abstract
No abstract record available.
Inventors
- 👤 Fayers Alfred Ayton
- 👤 Gates Benjamin George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:14
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/28; G01C17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1472342A
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US1724048A
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US1984465A
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US1996906A
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US2407270A
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US2272607A
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US2291715A
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FR865047A
Cited
US2370818A
Cited
US2407536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |