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Patent US3370246A successfully refreshed from Google Patents.
US3370246A
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Alternating current power controller
Assignee: DONALD F O'BRIEN
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Filing: 1965-03-19
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Granted: 1968-02-20
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Expires: 1985-03-19
Abstract
No abstract record available.
Inventors
- 👤 Donald F O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:03
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/20; H03F3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2166929A
Cited
GB484332A
Cited
US2358480A
Cited
US3102241A
Cited
FR1265974A
Cited
US3134080A
Cited
US3254308A
Cited
US3284726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |