US2993205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface wave antenna array with radiators for coupling surface wave to free space wave
Assignee: Litton Industries of Maryland Inc
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Filing: 1955-08-19
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Granted: 1961-07-18
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Expires: 1975-08-19
Abstract
No abstract record available.
Inventors
- 👤 Cooper Herbert Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:03
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/28; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/286; H01Q21/00; H01Q21/0006; H01Q21/0012; H01Q21/06; H01Q21/061; H01Q21/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2659817A
Cited
US2654842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |