US2660676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal generating device
Assignee: AT&T Inc
•
Filing: 1950-02-15
•
Granted: 1953-11-24
•
Expires: 1970-02-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Stephen Doba
- 👤 John W Bieke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:26
CPC Classifications
H; H04; H04N; H04N17/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1706538A
Cited
US2292045A
Cited
US2352488A
Cited
US2411648A
Cited
US2444036A
Cited
US2515613A
Cited
US2525102A
Cited
US2570775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |