Patent US3372304A successfully refreshed from Google Patents.
US3372304A
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US
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Overload protection for scr motor control circuit
Assignee: Westinghouse Air Brake Co
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Filing: 1964-11-06
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Granted: 1968-03-05
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Expires: 1984-11-06
Abstract
No abstract record available.
Inventors
- 👤 John J Kuipers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:17
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/32; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/122; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/903; Y10S388/907; Y10S388/917; Y10S388/918; Y10S388/923; Y10S388/934
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |