Patent US3696037A successfully refreshed from Google Patents.
US3696037A
Expired / Lapsed
US
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Anhydrous electrolyte for electrolytic capacitors
Assignee: RIFA SWEDEN BOX 945 S-391 29 KALMAR SWEDEN AB
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Filing: 1970-06-10
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Granted: 1972-10-03
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Expires: 1990-06-10
Abstract
Abstract ELECTROLYTE FOR ELECTROLYTIC CAPACITOR, CONSISTING OF A SOLUTION OF PHTHALIC ACID IN AN AMIDE, THE PHTHALIC ACID BEING AT LEAST PARTLY NEUTRALIZED WITH AN AMINE.
Inventors
- 👤 Bengt Ake Lagercrantz
- 👤 Kare Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:17
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |