Patent US2701307A successfully refreshed from Google Patents.
US2701307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio antenna for aircraft
Assignee: National Research Development Corp UK
•
Filing: 1949-06-20
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Granted: 1955-02-01
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Expires: 1969-06-20
Abstract
No abstract record available.
Inventors
- 👤 Cary Rex Henry John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:09
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/286; H01Q1/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1933941A
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US1934602A
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US1965539A
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US2235139A
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GB530220A
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US2358520A
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US2279130A
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US2368663A
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US2518843A
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US2612606A
Cited
US2474480A
Cited
US2589664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |