Patent US3334981A successfully refreshed from Google Patents.
US2583590A
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US
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Centrifugal switch for induction motors
Assignee: EVERETTE TOMPKINS J
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Filing: 1947-09-10
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Granted: 1952-01-29
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Expires: 1967-09-10
Abstract
No abstract record available.
Inventors
- 👤 Ervin J Osterhus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:50
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/06; H01H35/10; H02; H02K; H02K11/00; H02K11/20; H02K11/21; H02K11/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1162047A
Cited
US1208421A
Cited
US1554694A
Cited
US1926339A
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US2021454A
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US2048494A
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US2083343A
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US2187207A
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US2225144A
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US2199232A
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US2368492A
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US2394283A
Cited
US2434001A
Cited
US2416973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |