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US2432371A
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Trailing antenna
Assignee: Douglas Aircraft Co Inc
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Filing: 1942-11-03
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Granted: 1947-12-09
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Expires: 1962-11-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank J Berberich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:46
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1637354A
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US1783299A
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US1953071A
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US2009354A
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US2137450A
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US2187575A
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US2249836A
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US2287257A
Cited
US2317622A
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US2275626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |