Patent US2684445A successfully refreshed from Google Patents.
US2684445A
Expired / Lapsed
US
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Lobe switching antenna
Assignee: United States Department of the Navy
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Filing: 1946-03-29
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Granted: 1954-07-20
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Expires: 1966-03-29
Abstract
No abstract record available.
Inventors
- 👤 James E Eaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:18
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/24; H01Q3/00; H01Q3/24; H01Q3/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129711A
Cited
US2216708A
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US2337324A
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US2460401A
Cited
US2425336A
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US2473446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |