US3383582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power conversion apparatus employing a magnetic control circuit for actuating gate turn-off switches
Assignee: AT&T Inc
•
Filing: 1964-05-07
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Granted: 1968-05-14
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Expires: 1984-05-07
Abstract
No abstract record available.
Inventors
- 👤 John D Bishop
- 👤 Edwin T Calkin
- 👤 Frank F Judd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:36
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/305; H02M3/315; H02M3/3155; Y; Y10; Y10S; Y10S323/00; Y10S323/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3097335A
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US3207975A
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US3092786A
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US3221241A
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US3246227A
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US3237126A
Cited
US3205426A
Cited
US3281644A
Cited
US3313997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |