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Patent US2589818A successfully refreshed from Google Patents.
US2589818A
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Antenna
Assignee: United States, AS REPRESENTED BY EXECUTIVE SECRETARY OF OFFICE OF SCIENTIFIC RESEARCH AND DEVELOPMENT
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Filing: 1946-06-25
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Granted: 1952-03-18
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Expires: 1966-06-25
Abstract
No abstract record available.
Inventors
- 👤 Ronold W P King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:00
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/286; H01Q19/00; H01Q19/10; H01Q19/108; H01Q21/00; H01Q21/24; H01Q9/00; H01Q9/04; H01Q9/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB338982A
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US2168860A
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US2184729A
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US2239909A
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US2274389A
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US2421593A
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US2368663A
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US2473328A
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US2418084A
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US2431124A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |