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Patent US2568719A successfully refreshed from Google Patents.
US2568719A
Expired / Lapsed
US
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Control system for aircraft control surface and tab
Assignee: Unisys Corp
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Filing: 1947-04-09
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Granted: 1951-09-25
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Expires: 1967-04-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert S Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/08; G05D1/0808; B; B64; B64C; B64C9/00; B64C9/10
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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |