US3054939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated power supply
Assignee: International Business Machines Corp
•
Filing: 1958-12-24
•
Granted: 1962-09-18
•
Expires: 1978-12-24
Abstract
No abstract record available.
Inventors
- 👤 Leon J Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:25
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1158474A
Cited
US1806351A
Cited
US2143745A
Cited
US2694177A
Cited
GB762511A
Cited
US2753513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |