US2653238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual frequency antenna
Assignee: Individual
•
Filing: 1945-10-26
•
Granted: 1953-09-22
•
Expires: 1965-10-26
Abstract
No abstract record available.
Inventors
- 👤 Kenneth T Bainbridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:35
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/24; H01Q21/28; H01Q5/00; H01Q5/40; H01Q5/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1973296A
Cited
FR737182A
Cited
US1927393A
Cited
US1938066A
Cited
US1931980A
Cited
US2156653A
Cited
US2292791A
Cited
US2415089A
Cited
US2416155A
Cited
US2516376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |