US2482158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directive antenna system
Assignee: AT&T Inc
•
Filing: 1945-07-21
•
Granted: 1949-09-20
•
Expires: 1965-07-21
Abstract
No abstract record available.
Inventors
- 👤 Cassius C Cutler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:19
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/13; H01Q19/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1281752A
Cited
FR527896A
Cited
US1973296A
Cited
US1857120A
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DE694423C
Cited
US2083242A
Cited
US2206923A
Cited
US2095083A
Cited
US2370053A
Cited
US2407057A
Cited
US2422184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-19 | 1953-03-21 | 1953-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-19 | 1957-03-21 | 1957-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-19 | 1961-03-21 | 1961-09-20 | $7700.00 | Window Closed / Lapsed |