Patent US3836682A successfully refreshed from Google Patents.
Patent US2865381A successfully refreshed from Google Patents.
Patent FR874773A successfully refreshed from Google Patents.
Patent CH71561A successfully refreshed from Google Patents.
Patent US1827407A successfully refreshed from Google Patents.
US1827407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic speed control system
Assignee: SIMMEN AUTOMATIC RAILWAY SIGNA
•
Filing: 1917-07-20
•
Granted: 1931-10-13
•
Expires: 1937-07-20
Abstract
No abstract record available.
Inventors
- 👤 Paul J Simmen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:35
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/12; B60T7/126
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) | 1934-10-12 | 1935-04-13 | 1935-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-10-12 | 1939-04-13 | 1939-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-10-12 | 1943-04-13 | 1943-10-13 | $7700.00 | Window Closed / Lapsed |