US3001833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake cylinder release valve device
Assignee: Westinghouse Air Brake Co
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Filing: 1959-12-22
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Granted: 1961-09-26
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Expires: 1979-12-22
Abstract
No abstract record available.
Inventors
- 👤 Walter B Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:50
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/36; B60T15/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |