Patent US4682888A successfully refreshed from Google Patents.
Patent US3159837A successfully refreshed from Google Patents.
US3159837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic landing control system using scanning interferometer beams
Assignee: ITT Gilfillan Inc
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Filing: 1960-03-15
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Granted: 1964-12-01
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Expires: 1980-03-15
Abstract
No abstract record available.
Inventors
- 👤 Alvin Guy Van Alstyne
- 👤 Cutler Burton
- 👤 Donovan C Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:20
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/44; G01S1/54; G01S1/58; G01S1/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
AN ELECTRONIC APPROACH AND LANDING SYSTEM FOR AIRCRAFT COMPRISING: AT LEAST ONE GROUND INSTALLED ANTENNA ADAPTED FOR ANGULAR SCANNING OF A SECTOR OF SPACE, SAID ANTENNA HAVING A NULL WITHIN THE RADIATION PATTERN IN THE DIRECTION OF SCAN; RADIO FREQUENCY GENERATING MEANS CONNECTED TO ENERGIZE SAID ANTENNA; MEANS OPERATIVELY COUPLED TO SAID ANTENNA TO CAUSE SAID ANGULAR SCANNING; MEANS RESPONSIVE TO THE ANGULAR SCANNING POSITION OF SAID ANTENNA TO GENERATE AN ANGLE DATA SIGNAL CONTINUOUSLY REPRESENTATIVE OF THE SCANNING DIRECTION OF SAID ANTENNA; MODULATING MEANS RESPONSIVE TO SAID ANGLE DATA SIGNAL FOR MODULATING THE EMISSION OF SAID RADIO FREQUENCY GENERATING MEANS IN ACCORDANCE WITH SAID ANGLE DATA; AIRBORNE RECEIVING MEANS FOR DETECTING SAID NULL AND TO RECEIVE CODED MODULATION FROM SAID MODULATED EMISSION; AND AIRBORNE MEANS RESPONSIVE TO SAID CODED MODULATIONAND SAID DETECTED NULL FOR SAMPLING THE VALUE OF SAID CODED MODULATION DURING THE TIME OF OCCURRENCE OF SAID NULL AND GENERATING A CORRESPONDING ANGLE REPRESENTING SIGNAL
Claim 2
Dependent Claim
157 words
AN ELECTRONIC APPROACH AND LANDING SYSTEM FOR AIRCRAFT COMPRISING: AT LEAST ONE GROUND INSTALLED ANTENNA ADAPTED FOR ANGULAR SCANNING OF A SECTOR OF SPACE, SAID ANTENNA HAVING A NULL WITHIN THE RADIATION PATTERN IN THE DIRECTION OF SCAN; RADIO FREQUENCY GENERATING MEANS CONNECTED TO ENERGIZE SAID ANTENNA; MEANS OPERATIVELY COUPLED TO SAID ANTENNA TO CAUSE SAID ANGULAR SCANNING; MEANS RESPONSIVE TO THE ANGULAR SCANNING POSITION OF SAID ANTENNA TO GENERATE AN ANGLE DATA SIGNAL CONTINUOUSLY REPRESENTATIVE OF THE SCANNING DIRECTION OF SAID ANTENNA; MODULATING MEANS RESPONSIVE TO SAID ANGLE DATA SIGNAL FOR MODULATING THE EMISSION OF SAID RADIO FREQUENCY GENERATING MEANS IN ACCORDANCE WITH SAID ANGLE DATA; AIRBORNE RECEIVING MEANS FOR DETECTING SAID NULL AND TO RECEIVE CODED MODULATION FROM SAID MODULATED EMISSION; AND AIRBORNE MEANS RESPONSIVE TO SAID CODED MODULATIONAND SAID DETECTED NULL FOR SAMPLING THE VALUE OF SAID CODED MODULATION DURING THE TIME OF OCCURRENCE OF SAID NULL AND GENERATING A CORRESPONDING ANGLE REPRESENTING SIGNAL
References Cited (Backward Citations)
DE767354C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |