US3454841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutralized solid-state rectifier
Assignee: Electronic Devices Inc
•
Filing: 1967-03-20
•
Granted: 1969-07-08
•
Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 Richard J Urba
- 👤 Edward D Semrai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:22
CPC Classifications
H; H10; H10W; H10W90/00; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/10; H02M7/103; H02M7/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3290516A
Cited
FR1381906A
Cited
GB1003102A
Cited
US3373336A
Cited
US3319136A
Cited
US3373335A
Cited
US3346784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |