US2626992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal delay device
Assignee: AT&T Inc
•
Filing: 1949-02-26
•
Granted: 1953-01-27
•
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 11:36
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2426663A
Cited
US2016247A
Cited
US2013415A
Cited
US2263902A
Cited
US2284088A
Cited
US2423306A
Cited
US2512156A
Cited
US2505364A
Cited
US2498737A
Cited
US2446835A
Cited
US2460153A
Cited
US2558012A
Cited
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 |