US2230853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light signal
Assignee: Hitachi Rail STS USA Inc
•
Filing: 1939-03-29
•
Granted: 1941-02-04
•
Expires: 1959-03-29
Abstract
No abstract record available.
Inventors
- 👤 Wesley B Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:49
CPC Classifications
B; B61; B61L; B61L5/00; B61L5/12; B61L5/18; B61L5/1809; B61L5/1818; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32114; Y10T403/32196; Y10T403/32204; Y10T403/32606; Y10T403/32631; Y10T403/32681; Y10T403/32704
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) | 1944-02-04 | 1944-08-05 | 1945-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-04 | 1948-08-05 | 1949-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-04 | 1952-08-05 | 1953-02-04 | $7700.00 | Window Closed / Lapsed |