US3172079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stall warning and automatic ignition system for aircraft
Assignee: Lockheed Martin Corp
•
Filing: 1962-09-26
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Granted: 1965-03-02
•
Expires: 1982-09-26
Abstract
No abstract record available.
Inventors
- 👤 David O Gunson
- 👤 Harold A Valery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:35
CPC Classifications
B; B64; B64D; B64D43/00; B64D43/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
IN COMBINATION IN AN AIRCRAFT HAVING A GAS TURBINE PRIMARY POWERPLANT SYSTEM WITH POWERPLANE SYSTEM IGNITION MEANS, A STALL WARNING SYSTEM PRESENTING A SIGNAL TO THE PILOT WHEN THE AIRCRAFT REACHES A PREDETERMINED ANGLE OF ATTACK OR GREATER, AND CONTROL FOR INITIATING OPERATION OF THE POWERPLANT SYSTEM IGNITION MEANS,
Claim 2
Dependent Claim
49 words
IN COMBINATION IN AN AIRCRAFT HAVING A GAS TURBINE PRIMARY POWERPLANT SYSTEM WITH POWERPLANE SYSTEM IGNITION MEANS, A STALL WARNING SYSTEM PRESENTING A SIGNAL TO THE PILOT WHEN THE AIRCRAFT REACHES A PREDETERMINED ANGLE OF ATTACK OR GREATER, AND CONTROL FOR INITIATING OPERATION OF THE POWERPLANT SYSTEM IGNITION MEANS,
References Cited (Backward Citations)
US2611810A
Cited
US2665860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |