US2575799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency power and impedance monitor
Assignee: AT&T Inc
•
Filing: 1948-05-27
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Granted: 1951-11-20
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Expires: 1968-05-27
Abstract
No abstract record available.
Inventors
- 👤 William H Doherty
- 👤 John F Morrison
- 👤 Elmer L Younker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:19
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01R27/04; B; B60; B60K; B60K25/00; B60K25/02; G01R21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2304015A
Cited
US2338556A
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US2416977A
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US2423390A
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US2423416A
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US2415823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |