US2524487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1946-05-14
•
Granted: 1950-10-03
•
Expires: 1966-05-14
Abstract
No abstract record available.
Inventors
- 👤 Roy R Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:16
CPC Classifications
B; B63; B63H; B63H21/00; B63H21/22; F; F01; F01L; F01L13/00; Y; Y10; Y10S; Y10S74/00; Y10S74/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2326911A
Cited
US2321098A
Cited
US2406264A
Cited
US2395202A
Cited
US2404545A
Cited
US2413390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |