Patent US3421258A successfully refreshed from Google Patents.
Patent US2766056A successfully refreshed from Google Patents.
US2766056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel adhesion control for railway rolling stock
Assignee: Individual
•
Filing: 1951-11-03
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Granted: 1956-10-09
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Expires: 1971-11-03
Abstract
No abstract record available.
Inventors
- 👤 Edwin B Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:16
CPC Classifications
B; B60; B60L; B60L3/00; B60L3/10; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1121988A
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US1360746A
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US1705878A
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US2099283A
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US2198022A
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US2208738A
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US2323818A
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US2418587A
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US2701873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |