US3454852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Redundant servo control system with crossfeeding of feedback for use in an autopilot
Assignee: BAE Systems PLC
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Filing: 1966-01-14
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Granted: 1969-07-08
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Expires: 1986-01-14
Abstract
No abstract record available.
Inventors
- 👤 John Edward Bourne
- 👤 John Albert Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:10
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/0055; G05D1/0077; B; B64; B64C; B64C13/00; B64C13/24; B64C13/38; B64C13/50; B64C13/505
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |