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US2953327A
Expired / Lapsed
US
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Stall prevention system for aircraft
Assignee: Unisys Corp
•
Filing: 1955-12-29
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Granted: 1960-09-20
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Warren F Clement
- 👤 Donal R Treffeisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:50
CPC Classifications
B; B64; B64D; B64D43/00; B64D43/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2487793A
Cited
US2701111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |