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US2887649A
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Electrical capacitors
Assignee: Sprague Electric Co
•
Filing: 1953-11-23
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Granted: 1959-05-19
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Expires: 1973-11-23
Abstract
No abstract record available.
Inventors
- 👤 David B Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:19
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1395931A
Cited
US2367152A
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GB563407A
Cited
US2416540A
Cited
US2506314A
Cited
GB619364A
Cited
US2470826A
Cited
DE829632C
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 |