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Patent US1833679A successfully refreshed from Google Patents.
US1833679A
Expired / Lapsed
US
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Railway switch operating apparatus
Assignee: Hitachi Rail STS USA Inc
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Filing: 1930-07-24
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Granted: 1931-11-24
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Expires: 1950-07-24
Abstract
No abstract record available.
Inventors
- 👤 Glen V Jefferson
- 👤 Edwin G Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:39
CPC Classifications
B; B61; B61L; B61L5/00; B61L5/04
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) | 1934-11-23 | 1935-05-25 | 1935-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-23 | 1939-05-25 | 1939-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-23 | 1943-05-25 | 1943-11-24 | $7700.00 | Window Closed / Lapsed |