US2887643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging circuit for a condenser
Assignee: SCIENT RES I Ltd
•
Filing: 1956-03-20
•
Granted: 1959-05-19
•
Expires: 1976-03-20
Abstract
No abstract record available.
Inventors
- 👤 Miyata Akira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:22
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/15; H02M7/151; H05; H05B; H05B41/00; H05B41/14; H05B41/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2515632A
Cited
US2415944A
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US2464238A
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US2467856A
Cited
US2441822A
Cited
US2716211A
Cited
US2756378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |