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US2416675A
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Horn antenna system
Assignee: AT&T Inc
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Filing: 1941-11-26
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Granted: 1947-03-04
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Expires: 1961-11-26
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Beck
- 👤 Harald T Friis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:41
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/36; H01Q1/38; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/13; H01Q19/132
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1641605A
Cited
US1689009A
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US2206923A
Cited
GB494835A
Cited
US2281274A
Cited
GB495977A
Cited
FR841036A
Cited
US2255042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-03 | 1950-09-02 | 1951-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-03 | 1954-09-02 | 1955-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-03 | 1958-09-02 | 1959-03-04 | $7700.00 | Window Closed / Lapsed |