US1728563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway-traffic-controlling apparatus
Assignee: Hitachi Rail STS USA Inc
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Filing: 1928-06-20
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Granted: 1929-09-17
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Expires: 1948-06-20
Abstract
No abstract record available.
Inventors
- 👤 Lars O Grondahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:19
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/06
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) | 1932-09-16 | 1933-03-18 | 1933-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-09-16 | 1937-03-18 | 1937-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-09-16 | 1941-03-18 | 1941-09-17 | $7700.00 | Window Closed / Lapsed |