Patent US3508128A successfully refreshed from Google Patents.
US3508128A
Expired / Lapsed
US
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Series-connected capacitor sections
Assignee: Sprague Electric Co
•
Filing: 1968-07-11
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Granted: 1970-04-21
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Expires: 1988-07-11
Abstract
No abstract record available.
Inventors
- 👤 William M Allison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:01
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/32; H01G4/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1911064A
Cited
GB338806A
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US2948838A
Cited
US2846627A
Cited
US2995688A
Cited
US3048750A
Cited
US3275914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |