Patent US2456427A successfully refreshed from Google Patents.
US2456427A
Expired / Lapsed
US
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Protective system for electric motors
Assignee: General Electric Co
•
Filing: 1944-11-28
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Granted: 1948-12-14
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Expires: 1964-11-28
Abstract
No abstract record available.
Inventors
- 👤 Harold S Ogden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:50
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1249526A
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US1279360A
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US1898921A
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US1912924A
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US2130453A
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US2140390A
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US2265203A
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US2232751A
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US2255092A
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US2250141A
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US2333210A
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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) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |