Patent US2626992A successfully refreshed from Google Patents.
US2626992A
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Signal delay device
Assignee: AT&T Inc
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Filing: 1949-02-26
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Granted: 1953-01-27
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Expires: 1969-02-26
Abstract
No abstract record available.
Inventors
- 👤 Erwin W Holman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:33
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2284088A
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US2423306A
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US2512156A
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US2505364A
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US2498737A
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US2446835A
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US2460153A
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US2558012A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-27 | 1956-07-28 | 1957-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-27 | 1960-07-28 | 1961-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-27 | 1964-07-28 | 1965-01-27 | $7700.00 | Window Closed / Lapsed |