US1674411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traffic-recording equipment for telephone systems
Assignee: Automatic Electric Inc
•
Filing: 1924-04-18
•
Granted: 1928-06-19
•
Expires: 1944-04-18
Abstract
No abstract record available.
Inventors
- 👤 John E Ostline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:02
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/22; H04M3/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
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) | 1931-06-19 | 1931-12-19 | 1932-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-06-19 | 1935-12-19 | 1936-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-06-19 | 1939-12-19 | 1940-06-19 | $7700.00 | Window Closed / Lapsed |