Patent US3111671A successfully refreshed from Google Patents.
US3111671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft landing system
Assignee: Cubic Corp
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Filing: 1960-07-11
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Granted: 1963-11-19
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Expires: 1980-07-11
Abstract
No abstract record available.
Inventors
- 👤 William J Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:02
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN COMBINATION: MEANS FOR GENERATING A REFERENCE SIGNAL; MEANS RESPONSIVE TO SAID REFERENCE SIGNAL FOR GENERATING FIRST AND SECOND SIGNALS DIFFERING IN FREQUENCY AND PHASE BY AN AMOUNT CORRESPONDING TO SAID REFERENCE SIGNAL; MEANS FOR MODULATING SAID REFERENCE SIGNAL ON ONE OF SAID FIRST AND SECOND SIGNALS; MEANS FOR RADIATING SAID FIRST AND SECOND SIGNALS FROM FIRST AND SECOND POINTS, RESPECTIVELY; RECEIVER MEANS FOR RECEIVING THE RADIATED FIRST AND SECOND SIGNALS; MEANS FOR DEMODULATING THE REFERENCE SIGNAL FROM THE SAID MODULATED FIRST OR SECOND SIGNAL; AND MEANS FOR MIXING SAID RECEIVED FIRST AND SECOND SIGNALS TO PRODUCE A SIGNAL WHOSE FREQUENCY CORRESPONDS TO SAID REFERENCE SIGNAL AND WHOSE PHASE RELATIONSHIP WITH THE DEMODULATED REFERENCE SIGNAL CORRESPONDS TO THE DIRECTION COSINE MEASURED BETWEEN SAID RECEIVER MEANS AND A LINE BETWEEN SAID FIRST AND SECOND POINT.
Claim 2
Dependent Claim
134 words
IN COMBINATION: MEANS FOR GENERATING A REFERENCE SIGNAL; MEANS RESPONSIVE TO SAID REFERENCE SIGNAL FOR GENERATING FIRST AND SECOND SIGNALS DIFFERING IN FREQUENCY AND PHASE BY AN AMOUNT CORRESPONDING TO SAID REFERENCE SIGNAL; MEANS FOR MODULATING SAID REFERENCE SIGNAL ON ONE OF SAID FIRST AND SECOND SIGNALS; MEANS FOR RADIATING SAID FIRST AND SECOND SIGNALS FROM FIRST AND SECOND POINTS, RESPECTIVELY; RECEIVER MEANS FOR RECEIVING THE RADIATED FIRST AND SECOND SIGNALS; MEANS FOR DEMODULATING THE REFERENCE SIGNAL FROM THE SAID MODULATED FIRST OR SECOND SIGNAL; AND MEANS FOR MIXING SAID RECEIVED FIRST AND SECOND SIGNALS TO PRODUCE A SIGNAL WHOSE FREQUENCY CORRESPONDS TO SAID REFERENCE SIGNAL AND WHOSE PHASE RELATIONSHIP WITH THE DEMODULATED REFERENCE SIGNAL CORRESPONDS TO THE DIRECTION COSINE MEASURED BETWEEN SAID RECEIVER MEANS AND A LINE BETWEEN SAID FIRST AND SECOND POINT.
References Cited (Backward Citations)
US2417807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |