US2419178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control for seriesparallel operation
Assignee: Westinghouse Electric Corp
•
Filing: 1942-09-18
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Granted: 1947-04-15
•
Expires: 1962-09-18
Abstract
No abstract record available.
Inventors
- 👤 Robert M Strong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:10
CPC Classifications
B; B60; B60L; B60L50/00; B60L50/10; B60L50/11; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/70; Y02T10/7072
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1860523A
Cited
US1871472A
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US2056783A
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US2264853A
Cited
US2266326A
Cited
US2292203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-14 | 1950-10-14 | 1951-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-14 | 1954-10-14 | 1955-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-14 | 1958-10-14 | 1959-04-15 | $7700.00 | Window Closed / Lapsed |