Patent US2760155A successfully refreshed from Google Patents.
US2760155A
Expired / Lapsed
US
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Phase and transmission measuring system
Assignee: AT&T Inc
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Filing: 1953-01-30
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Granted: 1956-08-21
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Expires: 1973-01-30
Abstract
No abstract record available.
Inventors
- 👤 Hugh P Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:51
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/46; G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |