US3475678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-phase a.c. regulator employing d.c. controlled magnetic amplifiers
Assignee: United States Department of the Army
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Filing: 1966-12-09
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Granted: 1969-10-28
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Expires: 1986-12-09
Abstract
No abstract record available.
Inventors
- 👤 Neil H Herman
- 👤 Donat A A Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:16
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F1/34; G05F1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2854620A
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US2806990A
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US2875396A
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US2901682A
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US3013199A
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US2969499A
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US3268798A
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US3360714A
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US3358210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |