Patent US2617853A successfully refreshed from Google Patents.
US2617853A
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Method of and system for measuring impedance mismatch
Assignee: AT&T Inc
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Filing: 1949-01-07
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Granted: 1952-11-11
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Expires: 1969-01-07
Abstract
No abstract record available.
Inventors
- 👤 Peter E Gilmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:50
CPC Classifications
H; H03; H03H; H03H2/00; H03H2/005; H03H2/006; G; G01; G01R; G01R27/00; G01R27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2191271A
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US2302143A
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US2323076A
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US2404797A
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US2400597A
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US2454042A
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US2530248A
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US2472785A
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US2516169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |