US1956691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick action valve device
Assignee: Westinghouse Air Brake Co
•
Filing: 1930-10-31
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Granted: 1934-05-01
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Expires: 1950-10-31
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Mccune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:43
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/36; B60T15/42; F; F16; F16K; F16K15/00; F16K15/14; F16K15/16; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7847; Y10T137/7849; Y10T137/7879; Y10T137/7888; Y10T137/7891
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) | 1937-04-30 | 1937-10-30 | 1938-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-30 | 1941-10-30 | 1942-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-30 | 1945-10-30 | 1946-05-01 | $7700.00 | Window Closed / Lapsed |