US2484374A
Expired / Lapsed
US
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Apparatus for detecting breaks of synchronism between electric machines
Assignee: UNION D'ELECTRICITE
•
Filing: 1946-05-11
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Granted: 1949-10-11
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Expires: 1966-05-11
Abstract
No abstract record available.
Inventors
- 👤 Cahen Francois Michel
- 👤 Chevallier Andre
- 👤 Henriet Pierre Marie Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:44
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/38; H02J3/40; H02J3/42; G; G01; G01R; G01R23/00; G01R23/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US649942A
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US701886A
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US1576189A
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US2013673A
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US2005962A
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US2205330A
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US2146632A
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US2388977A
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US2339612A
Cited
US2405568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |