Patent US2641648A successfully refreshed from Google Patents.
US2641648A
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US
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Directional coupler
Assignee: Unisys Corp
•
Filing: 1949-01-25
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Granted: 1953-06-09
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Expires: 1969-01-25
Abstract
No abstract record available.
Inventors
- 👤 Sensiper Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:22
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/181; H01P5/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2580678A
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US2423506A
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US2423390A
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US2423416A
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US2473274A
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US2479650A
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US2519734A
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US2478317A
Cited
US2573746A
Cited
US2575799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |