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US2430291A
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Railway traffic controlling apparatus with manual change-over from remote to local control
Assignee: Hitachi Rail STS USA Inc
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Filing: 1944-09-12
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Granted: 1947-11-04
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Expires: 1964-09-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Hays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:41
CPC Classifications
B; B61; B61L; B61L7/00; B61L7/06; B61L7/08; B61L7/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1956605A
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US2063971A
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US2060487A
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US2060485A
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US2176273A
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US2169615A
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US2298806A
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US2315032A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-03 | 1951-05-05 | 1951-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-03 | 1955-05-05 | 1955-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-03 | 1959-05-05 | 1959-11-04 | $7700.00 | Window Closed / Lapsed |