Patent US2460401A successfully refreshed from Google Patents.
US2460401A
Expired / Lapsed
US
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Directive microwave radio antenna
Assignee: AT&T Inc
•
Filing: 1943-04-01
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Granted: 1949-02-01
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Expires: 1963-04-01
Abstract
No abstract record available.
Inventors
- 👤 George C Southworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:38
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129711A
Cited
US2206923A
Cited
US2188649A
Cited
US2202380A
Cited
US2223224A
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US2304540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-01 | 1952-08-02 | 1953-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-01 | 1956-08-02 | 1957-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-01 | 1960-08-02 | 1961-02-01 | $7700.00 | Window Closed / Lapsed |