Patent US2451258A successfully refreshed from Google Patents.
US2451258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed antenna
Assignee: RCA Corp
•
Filing: 1943-12-01
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Granted: 1948-10-12
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Expires: 1963-12-01
Abstract
No abstract record available.
Inventors
- 👤 Trevor Bertram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:14
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1557049A
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US1981058A
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US1797534A
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US2149415A
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US2229733A
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US2237792A
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US2267951A
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US2322971A
Cited
US2274389A
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US2332952A
Cited
US2413187A
Cited
US2421593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |