US3101471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio direction indicator
Assignee: International Standard Electric Corp
•
Filing: 1950-02-04
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Granted: 1963-08-20
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Expires: 1970-02-04
Abstract
No abstract record available.
Inventors
- 👤 Stavis Gus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:47
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN INDICATING SYSTEM FOR INDICATING POSITION OF A CRAFT AT A RELATIVELY FIXED STATION IN RESPONSE TO ELECTRICAL PULSES RECEIVED FROM SAID CRAFT AT SPACED POINTS AT SAID RELATIVELY FIXED STATION, COMPRISING A PAIR OF SPACED RECEIVING ANTENNAS, A TRANSLATOR MEANS FOR DERIVING FROM SAID RECEIVED PULSES AT EACH ANTENNA, WAVE ENERGIES OF A FREQUENCY SUCH THAT A HALF WAVE THEREOF IS AT LEAST EQUAL TO SAID ANTENNA SPACING AND PHASED WITH RESPECT TO EACH OTHER, DEPENDENT UPON THE TIME OF RECEPTION OF SAID ANTENNAS, COMBINING MEANS COMPRISING MEANS FOR DERIVING
Claim 2
Dependent Claim
91 words
AN INDICATING SYSTEM FOR INDICATING POSITION OF A CRAFT AT A RELATIVELY FIXED STATION IN RESPONSE TO ELECTRICAL PULSES RECEIVED FROM SAID CRAFT AT SPACED POINTS AT SAID RELATIVELY FIXED STATION, COMPRISING A PAIR OF SPACED RECEIVING ANTENNAS, A TRANSLATOR MEANS FOR DERIVING FROM SAID RECEIVED PULSES AT EACH ANTENNA, WAVE ENERGIES OF A FREQUENCY SUCH THAT A HALF WAVE THEREOF IS AT LEAST EQUAL TO SAID ANTENNA SPACING AND PHASED WITH RESPECT TO EACH OTHER, DEPENDENT UPON THE TIME OF RECEPTION OF SAID ANTENNAS, COMBINING MEANS COMPRISING MEANS FOR DERIVING
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |