US2431445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antislipping device for railway cars
Assignee: Individual
•
Filing: 1944-11-06
•
Granted: 1947-11-25
•
Expires: 1964-11-06
Abstract
No abstract record available.
Inventors
- 👤 Albert F Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:57
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/321; B60T8/3235; B60T8/3245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US828939A
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US1727397A
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US2025889A
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US2038144A
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US2109168A
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US2096505A
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US2232751A
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US2272872A
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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) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |