US3453526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated d.c. power supply with frequency-selective ripple removal
Assignee: English Electric Co Ltd
•
Filing: 1967-06-08
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Granted: 1969-07-01
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Expires: 1987-06-08
Abstract
No abstract record available.
Inventors
- 👤 John Patrick Bowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:21
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/14; H02M1/143; G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/42; H02J; H02J3/00; H02J3/36; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/162; H02M7/1623; H02M7/1626; Y; Y02; Y02E; Y02E60/00; Y02E60/60
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |