US3177487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Altimeter with frequency-modulation
Assignee: Safran Aircraft Engines SAS
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Filing: 1962-04-23
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Granted: 1965-04-06
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Expires: 1982-04-23
Abstract
No abstract record available.
Inventors
- 👤 Quiot Henri Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/10; G01S13/26; G01S7/00; G01S7/02; G01S7/35; G01S7/352; G06; G06G; G06G7/00; G06G7/12; G06G7/19; G06G7/1928; G06G7/1935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A FREQUENCY-MODULATED RADIO-ALTIMETER OF THE TYPE HAVING, IN SUCCESSION ASSEMBLY, A SIGNAL TRANSMITTER, A MIXER OF THE TRANSMITTED SIGNAL AND CORRESPONDING ECHO SIGNAL, WHICH PRODUCES A BEAT-FREQUENCY VOLTAGE, AND A PULSE COUNTER, THE IMPROVEMENT COMPRISING A PEAK-CLIPPER STAGE HAVING AN INPUT TO WHICH SAID BEAT-FREQUENCY VOLTAGE IS APPLIED AND AN OUTPUT CONNECTED TO SAID COUNTER, AND A STAIRCASE VOLTAGE GENERATOR HAVING A FREQUENCY SUBSTANTIALLY LOWER THAN THE MODULATION FREQUENCY AND CONNECTED TO SAID PEAK-CLIPPER STAGE TO APPLY THERETO SAID STAIRCASE VOLTAGE.
Claim 2
Dependent Claim
82 words
IN A FREQUENCY-MODULATED RADIO-ALTIMETER OF THE TYPE HAVING, IN SUCCESSION ASSEMBLY, A SIGNAL TRANSMITTER, A MIXER OF THE TRANSMITTED SIGNAL AND CORRESPONDING ECHO SIGNAL, WHICH PRODUCES A BEAT-FREQUENCY VOLTAGE, AND A PULSE COUNTER, THE IMPROVEMENT COMPRISING A PEAK-CLIPPER STAGE HAVING AN INPUT TO WHICH SAID BEAT-FREQUENCY VOLTAGE IS APPLIED AND AN OUTPUT CONNECTED TO SAID COUNTER, AND A STAIRCASE VOLTAGE GENERATOR HAVING A FREQUENCY SUBSTANTIALLY LOWER THAN THE MODULATION FREQUENCY AND CONNECTED TO SAID PEAK-CLIPPER STAGE TO APPLY THERETO SAID STAIRCASE VOLTAGE.
References Cited (Backward Citations)
US2572788A
Cited
US2867767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |