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US2748350A
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Ultra-high frequency selective mode directional coupler
Assignee: AT&T Inc
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Filing: 1951-09-05
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Granted: 1956-05-29
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Expires: 1971-09-05
Abstract
No abstract record available.
Inventors
- 👤 Stewart E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:53
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2562281A
Cited
US2566386A
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US2512191A
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US2514779A
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FR976704A
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US2615982A
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US2643298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |