US3112905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane instruments
Assignee: Safe Flight Instrument LLC
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Filing: 1961-05-24
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Granted: 1963-12-03
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Expires: 1981-05-24
Abstract
No abstract record available.
Inventors
- 👤 Leonard M Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:03
CPC Classifications
B; B64; B64D; B64D43/00; B64D43/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
AN AIRPLANE INSTRUMENT COMPRISING FIRST MEANS HAVING A VARIABLE OUTPUT RESPONSIVE TO THE LIFT OF AN AIRPLANE, SECOND MEANS HAVING A VARIABLE OUTPUT RESPONSIVE TO THE FORWARD ACCELERATION OF THE AIRPLANE, THIRD MEANS HAVING A VARIABLE OUTPUT RESPONSIVE TO THE PITCH ATTITUDE OF THE AIRPLANE AND OPPOSING THE OUTPUT OF THE SECOND MEANS FOR POSITIVE FORWARD ACCELERATION, AND MEANS COMBINING SAID OUTPUTS TO PROVIDE A DIRECTOR SIGNAL THAT INCREASES WITH INCREASE IN AVAILABLE LIFT AND WITH POSITIVE FORWARD
Claim 2
Dependent Claim
78 words
AN AIRPLANE INSTRUMENT COMPRISING FIRST MEANS HAVING A VARIABLE OUTPUT RESPONSIVE TO THE LIFT OF AN AIRPLANE, SECOND MEANS HAVING A VARIABLE OUTPUT RESPONSIVE TO THE FORWARD ACCELERATION OF THE AIRPLANE, THIRD MEANS HAVING A VARIABLE OUTPUT RESPONSIVE TO THE PITCH ATTITUDE OF THE AIRPLANE AND OPPOSING THE OUTPUT OF THE SECOND MEANS FOR POSITIVE FORWARD ACCELERATION, AND MEANS COMBINING SAID OUTPUTS TO PROVIDE A DIRECTOR SIGNAL THAT INCREASES WITH INCREASE IN AVAILABLE LIFT AND WITH POSITIVE FORWARD
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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |