US2495219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional antenna system
Assignee: AT&T Inc
•
Filing: 1945-01-24
•
Granted: 1950-01-24
•
Expires: 1965-01-24
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:12
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/24; H01Q3/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1934078A
Cited
US2002181A
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US1912487A
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US2026652A
Cited
DE668231C
Cited
US2396044A
Cited
US2350664A
Cited
US2427005A
Cited
US2422184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |