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US2461005A
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US
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Ultra high frequency transmission
Assignee: AT&T Inc
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Filing: 1940-04-05
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Granted: 1949-02-08
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Expires: 1960-04-05
Abstract
No abstract record available.
Inventors
- 👤 George C Southworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:03
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/29; H01Q13/00; H01Q13/02; H01Q21/06; H01Q21/061; H01Q21/064; H01Q3/00; H01Q3/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US350608A
Cited
US1384014A
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US2159937A
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GB466063A
Cited
US2106768A
Cited
US2151118A
Cited
FR825438A
Cited
US2212110A
Cited
US2202380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |