US3496444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage converter circuits
Assignee: Siemens Mobility Ltd
•
Filing: 1967-12-26
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Granted: 1970-02-17
•
Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G King
- 👤 Derek E Burch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:57
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/135; H02M3/137; H02M3/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3366866A
Cited
US3334291A
Cited
US3082369A
Cited
US3321697A
Cited
US3303406A
Cited
US3300706A
Cited
US3328721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |