US2558445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traffic controlling apparatus
Assignee: Hitachi Rail STS USA Inc
•
Filing: 1947-09-06
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Granted: 1951-06-26
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Expires: 1967-09-06
Abstract
No abstract record available.
Inventors
- 👤 Robert M Laurenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:30
CPC Classifications
B; B61; B61L; B61L13/00; B61L13/04; B61L13/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |