Patent US2399387A successfully refreshed from Google Patents.
US2399387A
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US
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Speed control system
Assignee: Westinghouse Electric Corp
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Filing: 1944-04-27
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Granted: 1946-04-30
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Expires: 1964-04-27
Abstract
No abstract record available.
Inventors
- 👤 Jack E Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:16
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/144; H05B7/148; H05B7/152; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-04-29 | 1949-10-29 | 1950-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-29 | 1953-10-29 | 1954-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-29 | 1957-10-29 | 1958-04-30 | $7700.00 | Window Closed / Lapsed |