US3374422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thyristor switching amplifiers for rapidly switching-on inductive loads
Assignee: US Philips Corp
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Filing: 1965-03-12
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Granted: 1968-03-19
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Expires: 1985-03-12
Abstract
No abstract record available.
Inventors
- 👤 Blume Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:56
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/18; H01F7/1805; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/135; H03K17/04; H03K17/0403; H03K17/041; H03K17/04113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |