Patent US3946059A successfully refreshed from Google Patents.
Patent US2402434A successfully refreshed from Google Patents.
US2402434A
Expired / Lapsed
US
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Variable load brake apparatus
Assignee: Westinghouse Air Brake Co
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Filing: 1944-08-25
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Granted: 1946-06-18
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Expires: 1964-08-25
Abstract
No abstract record available.
Inventors
- 👤 Claude A Nelson
- 👤 John N Good
- 👤 Salardi Albert B De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:25
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1837; B60T8/185; B60T8/1893
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) | 1949-06-17 | 1949-12-17 | 1950-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-06-17 | 1953-12-17 | 1954-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-06-17 | 1957-12-17 | 1958-06-18 | $7700.00 | Window Closed / Lapsed |