US2508169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating current motor control system
Assignee: Westinghouse Electric Corp
•
Filing: 1944-05-26
•
Granted: 1950-05-16
•
Expires: 1964-05-26
Abstract
No abstract record available.
Inventors
- 👤 Ruel C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:21
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US532593A
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US904788A
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US945925A
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GB191202325A
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US1210816A
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US1469219A
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US1739330A
Cited
GB470767A
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GB546572A
Cited
US2412515A
Cited
US2412514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |