US2438410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually operative selective control device
Assignee: WEST NGHOUSE AIR BRAKE Co
•
Filing: 1943-04-30
•
Granted: 1948-03-23
•
Expires: 1963-04-30
Abstract
No abstract record available.
Inventors
- 👤 Harry C May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:37
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06; F16; F16D; F16D25/00; F16D25/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/8593; Y10T137/86911; Y10T137/87048; Y10T137/87056; Y10T137/87072; Y10T74/00; Y10T74/20; Y10T74/20012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE121652C
Cited
DE644255C
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US2314842A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |