Patent US2454774A successfully refreshed from Google Patents.
US2454774A
Expired / Lapsed
US
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Antenna
Assignee: STC PLC
•
Filing: 1945-08-29
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Granted: 1948-11-30
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Expires: 1965-08-29
Abstract
No abstract record available.
Inventors
- 👤 Frank O Chesus
- 👤 Frank G Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:46
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2158376A
Cited
US2184729A
Cited
US2234234A
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US2297513A
Cited
US2274389A
Cited
US2323641A
Cited
US2385783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |