Patent US3461943A successfully refreshed from Google Patents.
US2574471A
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Gyromagnetic compass
Assignee: Unisys Corp
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Filing: 1945-08-23
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Granted: 1951-11-13
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Expires: 1965-08-23
Abstract
No abstract record available.
Inventors
- 👤 Caesar F Fragola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:38
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/36; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229
Claims Analysis
Total Claims: 0
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US2086398A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |