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Patent US2454968A successfully refreshed from Google Patents.
US2454968A
Expired / Lapsed
US
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Single-phase induction-motor control system
Assignee: Singer Co
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Filing: 1945-07-13
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Granted: 1948-11-30
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Expires: 1965-07-13
Abstract
No abstract record available.
Inventors
- 👤 Harry B Fuge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:06
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |