US3136997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable glide slope system
Assignee: TDK Micronas GmbH
•
Filing: 1959-05-22
•
Granted: 1964-06-09
•
Expires: 1979-05-22
Abstract
No abstract record available.
Inventors
- 👤 Lucanera Constantino
- 👤 Ernest J Annechiarico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:20
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A GLIDE SLOPE AIRCRAFT INSTRUMENT LANDING SYSTEM COMPRISING A BEACON EMITTING ELECTROMAGNETIC RADIATION HAVING PHASE CHARACTERISTICS WHICH DEFINE GLIDE SLOPE PATHS, SAID BEACON BEING ADAPTED TO UTILIZE REFLECTIONS OF SAID RADIATION FROM THE GROUND IN REINFORCING SAID PHASE CHARACTERISTICS, EQUIPMENT CARRIED BY AN AIRCRAFT TO COOPERATE WITH SAID BEACON, SAID EQUIPMENT COMPRISING RECEIVING MEANS RESPONSIVE TO SAID RADIATION FROM SAID BEACON, PHASE SHIFTING MEANS COUPLED TO THE OUTPUT OF SAID RECEIVER, SELECTING MEANS COUPLED TO SAID PHASE SHIFTING MEANS FOR SELECTING ANY DESIRED GLIDE SLOPE PATH FOR SAID AIRCRAFT, A FIXED PHASE REFERENCE SIGNAL OF THE SAME FREQUENCY OF SAID RECEIVER OUTPUT, MEANS TO COMPARE THE OUTPUT OF SAID PHASE SHIFTING MEANS WITH SAID FIXED PHASE REFERENCE SIGNAL, AND INDICATING MEANS COUPLED TO SAID COMPARING MEANS FOR DETERMINING THE GLIDE SLOPE OF SAID AIRCRAFT WITH RESPECT TO SAID DESIRED SELECTED GLIDE SLOPE PATH.
Claim 2
Dependent Claim
143 words
A GLIDE SLOPE AIRCRAFT INSTRUMENT LANDING SYSTEM COMPRISING A BEACON EMITTING ELECTROMAGNETIC RADIATION HAVING PHASE CHARACTERISTICS WHICH DEFINE GLIDE SLOPE PATHS, SAID BEACON BEING ADAPTED TO UTILIZE REFLECTIONS OF SAID RADIATION FROM THE GROUND IN REINFORCING SAID PHASE CHARACTERISTICS, EQUIPMENT CARRIED BY AN AIRCRAFT TO COOPERATE WITH SAID BEACON, SAID EQUIPMENT COMPRISING RECEIVING MEANS RESPONSIVE TO SAID RADIATION FROM SAID BEACON, PHASE SHIFTING MEANS COUPLED TO THE OUTPUT OF SAID RECEIVER, SELECTING MEANS COUPLED TO SAID PHASE SHIFTING MEANS FOR SELECTING ANY DESIRED GLIDE SLOPE PATH FOR SAID AIRCRAFT, A FIXED PHASE REFERENCE SIGNAL OF THE SAME FREQUENCY OF SAID RECEIVER OUTPUT, MEANS TO COMPARE THE OUTPUT OF SAID PHASE SHIFTING MEANS WITH SAID FIXED PHASE REFERENCE SIGNAL, AND INDICATING MEANS COUPLED TO SAID COMPARING MEANS FOR DETERMINING THE GLIDE SLOPE OF SAID AIRCRAFT WITH RESPECT TO SAID DESIRED SELECTED GLIDE SLOPE PATH.
References Cited (Backward Citations)
US2257320A
Cited
US2748385A
Cited
US2753556A
Cited
US2836820A
Cited
US2815507A
Cited
US2912693A
Cited
US3004256A
Cited
US2938205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |