Patent US3560982A successfully refreshed from Google Patents.
US3560982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vlf-lf aircraft trailing antenna
Assignee: Collins Radio Co
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Filing: 1968-10-01
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Granted: 1971-02-02
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Expires: 1988-10-01
Abstract
Abstract A VLF-LF AIRCRAFT ANTENNA WHICH CAN ACCOMMODATE A HIGH POWER TRANSMITTER INCLUDING A FIRST WIRE OF APPROXXIMATELY ONE-HALF THE OPERATING FREQUENCY WAVELENGTH IN LENGTH AND AT LEAST ONE OTHER WIRE OF APPROXIMATELY ONETWENTIETH THE OPERATING FREQUENCY WAVELENGTH IN LENGTH.
Inventors
- 👤 Richard C Fenwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:40
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |