Patent US3548347A successfully refreshed from Google Patents.
US3548347A
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US
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Filter unit having monolithic capacitor
Assignee: Sprague Electric Co
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Filing: 1968-02-16
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Granted: 1970-12-15
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Expires: 1988-02-16
Abstract
No abstract record available.
Inventors
- 👤 David S Miller
- 👤 Harvey E Goodell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:18
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/35; H01G4/40; H03; H03H; H03H1/00; H03H1/0007; C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/19; C10L1/191; C10L1/192; C10L1/198; C10L1/1985; C10L1/24; C10L1/2431; C10L1/2437; C10L1/26; C10L1/2608; C10L1/2633; C10L1/2641
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2430433A
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US2491681A
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US2898523A
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US3060392A
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US3137808A
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US3163834A
Cited
US3398326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |