US3479543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound excitation system
Assignee: General Electric Co
•
Filing: 1967-12-11
•
Granted: 1969-11-18
•
Expires: 1987-12-11
Abstract
No abstract record available.
Inventors
- 👤 Karl F Drexler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:54
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/26; H02K19/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2165976A
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US2208416A
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US2454582A
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US2568407A
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FR1050847A
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US2679605A
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US2796580A
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US2897383A
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US3034035A
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US3032700A
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US3132296A
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US3351845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |