Patent GB291007A successfully refreshed from Google Patents.
US2941406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyro smoothing system
Assignee: North American Aviation Corp
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Filing: 1955-09-30
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Granted: 1960-06-21
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Expires: 1975-09-30
Abstract
No abstract record available.
Inventors
- 👤 Henry E Singleton
- 👤 Stephen F Crumb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:39
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221; Y10T74/1225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |