US3452267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage rectifier
Assignee: Unitrode Corp
•
Filing: 1968-01-31
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Granted: 1969-06-24
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Expires: 1988-01-31
Abstract
No abstract record available.
Inventors
- 👤 Chester L Schuler
- 👤 David H Margolien
- 👤 Fred M Blatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:41
CPC Classifications
H; H10; H10W; H10W90/00; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/10; H02M7/103; H02M7/106; H10W76/00; H10W76/10; H10W76/12; H10W76/161
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2861227A
Cited
US2984773A
Cited
US3229188A
Cited
US3295046A
Cited
US3335339A
Cited
US3398349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |