US2431145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control system for locomotives
Assignee: Baldwin Locomotive Works
•
Filing: 1945-03-23
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Granted: 1947-11-18
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Expires: 1965-03-23
Abstract
No abstract record available.
Inventors
- 👤 Dana R Staples
- 👤 Ralph A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:31
CPC Classifications
B; B60; B60L; B60L3/00; B60L3/10; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22588E
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US715019A
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US2050068A
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US2371832A
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US2303951A
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US2266326A
Cited
US2280378A
Cited
US2337717A
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US2304937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |