Patent US3985141A successfully refreshed from Google Patents.
US2678418A
Expired / Lapsed
US
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Control system for a plurality of electric circuits
Assignee: General Electric Co
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Filing: 1951-07-25
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Granted: 1954-05-11
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Expires: 1971-07-25
Abstract
No abstract record available.
Inventors
- 👤 Rodney A Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:48
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/1209
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2057531A
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US2123859A
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US2169866A
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US2141927A
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US2305380A
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US2285556A
Cited
US2404614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |