US2923311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple valve unit and method of construction and assembly thereof
Assignee: Westinghouse Air Brake Co
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Filing: 1957-08-29
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Granted: 1960-02-02
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Expires: 1977-08-29
Abstract
No abstract record available.
Inventors
- 👤 William B Jeffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:47
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/36; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0491; Y10T137/0502; Y10T137/598; Y10T137/6007; Y10T137/8158; Y10T137/8359; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/49945
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |