US1434795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling device
Assignee: AT&T Inc
•
Filing: 1919-11-08
•
Granted: 1922-11-07
•
Expires: 1939-11-08
Abstract
No abstract record available.
Inventors
- 👤 Harold W Ryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:37
CPC Classifications
G; G08; G08B; G08B5/00; G08B5/22; G08B5/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-11-06 | 1926-05-08 | 1926-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-11-06 | 1930-05-08 | 1930-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-11-06 | 1934-05-08 | 1934-11-07 | $7700.00 | Window Closed / Lapsed |