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US2989161A
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Electromagnetic clutch with stationary coil
Assignee: ITE Circuit Breaker Co
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Filing: 1955-11-25
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Granted: 1961-06-20
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Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 Diebold Edward John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:31
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/10; F16D27/108; F16D27/112; F16D27/115; F16D13/00; F16D13/58; F16D13/60; F16D13/64; F16D13/648; F16D2027/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US754291A
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US918254A
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US1340885A
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US1493237A
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DE472567C
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US2135126A
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US2254625A
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GB516963A
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US2305788A
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GB533260A
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US2875875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |