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Patent US2488441A successfully refreshed from Google Patents.
US2488441A
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Electromagnetic nonchattering relay
Assignee: Westinghouse Electric Corp
•
Filing: 1945-02-06
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Granted: 1949-11-15
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Expires: 1965-02-06
Abstract
No abstract record available.
Inventors
- 👤 Harold D Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:44
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/20; H01H50/64; H01H50/645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE152551C
Cited
US792859A
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US983976A
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US1239114A
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US1793858A
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US2026415A
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US1995620A
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US2170961A
Cited
US2238154A
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US2387264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |