Patent US2803009A successfully refreshed from Google Patents.
US2803009A
Expired / Lapsed
US
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Protective shield for providing an impedance match between a radar feed and its parabolic reflector
Assignee: AT&T Inc
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Filing: 1950-11-13
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Granted: 1957-08-13
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Expires: 1970-11-13
Abstract
No abstract record available.
Inventors
- 👤 James O Seamans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:47
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/02; H01Q19/021; H01Q19/025; H01Q3/00; H01Q3/12; H01Q3/16; H01Q3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |