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Patent US2839631A successfully refreshed from Google Patents.
US2839631A
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Electromagnetic device
Assignee: General Electric Co
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Filing: 1954-07-28
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Granted: 1958-06-17
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Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 Neil O Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:02
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/08; H01H50/16; H01H50/36; H01H51/00; H01H51/30; H01H2050/367; H01H50/44; H01H50/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US273728A
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US904367A
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US1552446A
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US2068494A
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US2241838A
Cited
US2275924A
Cited
US2284621A
Cited
US2253142A
Cited
US2471181A
Cited
US2547131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |