Patent US5188632A successfully refreshed from Google Patents.
Patent US2176866A successfully refreshed from Google Patents.
US2176866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the control of highway crossing signals
Assignee: Hitachi Rail STS USA Inc
•
Filing: 1938-07-08
•
Granted: 1939-10-24
•
Expires: 1958-07-08
Abstract
No abstract record available.
Inventors
- 👤 Earl M Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
B; B61; B61L; B61L29/00; B61L29/24; B61L29/28; B61L29/288
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) | 1942-10-23 | 1943-04-24 | 1943-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-23 | 1947-04-24 | 1947-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-23 | 1951-04-24 | 1951-10-24 | $7700.00 | Window Closed / Lapsed |