Patent US3470559A successfully refreshed from Google Patents.
US3470559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio receiving and transmitting systems
Assignee: BAE Systems Electronics Ltd
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Filing: 1966-11-21
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Granted: 1969-09-30
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Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 Matthew Frederick Radford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:11
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0891; H04B7/0894; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/10; H01Q3/00; H01Q3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A HIGH FREQUENCY RADIO TRANSMITTING OR RECEIVING SYSTEM COMPRISING AN AERIAL SYSTEM CONSISTING OF TWO LOGARITHMIC AERIAL ARRAYS WHICH INCLINE TOWARDS ONE ANOTHER AT SUBSTANTIALLY 90* AND EACH OF WHICH IS AT SUBSTANTIALLY 45* TO THE HORIZONTAL; AND A FOUR PORT HYBRID CIRCUIT ARRANGEMENT HAVING TWO PORTS COUPLED RESPECTIVELY TO THE TWO ARRAYS AND TWO OTHER PORTS SERVING AS SIGNAL INPUT OR OUTPUT PORTS.
Claim 2
Dependent Claim
64 words
A HIGH FREQUENCY RADIO TRANSMITTING OR RECEIVING SYSTEM COMPRISING AN AERIAL SYSTEM CONSISTING OF TWO LOGARITHMIC AERIAL ARRAYS WHICH INCLINE TOWARDS ONE ANOTHER AT SUBSTANTIALLY 90* AND EACH OF WHICH IS AT SUBSTANTIALLY 45* TO THE HORIZONTAL; AND A FOUR PORT HYBRID CIRCUIT ARRANGEMENT HAVING TWO PORTS COUPLED RESPECTIVELY TO THE TWO ARRAYS AND TWO OTHER PORTS SERVING AS SIGNAL INPUT OR OUTPUT PORTS.
References Cited (Backward Citations)
US1898058A
Cited
US2904677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |