US3404856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic stabilization of aircraft
Assignee: Boeing Co
•
Filing: 1961-11-14
•
Granted: 1968-10-08
•
Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Milton I Gerstine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:24
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/82; G; G05; G05D; G05D1/00; G05D1/08; G05D1/0808; G05D1/0858
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |