US2480181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directive high-frequency antenna
Assignee: United States, WAR, Secretary of
•
Filing: 1945-01-24
•
Granted: 1949-08-30
•
Expires: 1965-01-24
Abstract
No abstract record available.
Inventors
- 👤 Stanley L Breen
- 👤 Chu Lan Jen
- 👤 Pao Chia-Shan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:21
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2002181A
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US2075808A
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US2082347A
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US2083242A
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US2206923A
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US2241119A
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US2189549A
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US2283054A
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US2396044A
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US2415807A
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US2415242A
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US2436380A
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US2438735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |