US2701307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio antenna for aircraft
Assignee: National Research Development Corp UK
•
Filing: 1949-06-20
•
Granted: 1955-02-01
•
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 18:51
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/286; H01Q1/287
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1933941A
Cited
US1934602A
Cited
US1965539A
Cited
US2235139A
Cited
GB530220A
Cited
US2358520A
Cited
US2279130A
Cited
US2368663A
Cited
US2518843A
Cited
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 |