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US3384890A
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Variable aperture variable polarization high gain antenna system for a discrimination radar
Assignee: United States Department of the Army
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Filing: 1965-10-07
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Granted: 1968-05-21
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Expires: 1985-10-07
Abstract
No abstract record available.
Inventors
- 👤 William F List
- 👤 Jr Conway A Bolt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:53
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/002; G; G01; G01S; G01S1/00; G01S1/02; H01Q21/00; H01Q21/06; H01Q21/22; H01Q21/24; H01Q21/245; H01Q3/00; H01Q3/26; H01Q3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2409448A
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US2866971A
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US3267472A
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US3116486A
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US3209355A
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US3264642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |