US3443194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dc-to-dc converter with continuous feed to the load
Assignee: International Business Machines Corp
•
Filing: 1967-09-14
•
Granted: 1969-05-06
•
Expires: 1987-09-14
Abstract
No abstract record available.
Inventors
- 👤 John R Cielo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:35
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/62; H02M3/325; H02M3/335; H02M3/33569; H02M3/33573; H02M3/337; H02M3/3376; H02M3/3378
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |