US1877626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway traffic controlling system
Assignee: Individual
•
Filing: 1929-07-18
•
Granted: 1932-09-13
•
Expires: 1949-07-18
Abstract
No abstract record available.
Inventors
- 👤 Matthew H Loughridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:56
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/16; B61L3/18; B61L3/185
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) | 1935-09-13 | 1936-03-14 | 1936-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-13 | 1940-03-14 | 1940-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-13 | 1944-03-14 | 1944-09-13 | $7700.00 | Window Closed / Lapsed |