Patent US3678345A successfully refreshed from Google Patents.
US3678345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor impregnated with electrolyte and oil containing depolarizer
Assignee: Wicon Kondenstorfabrik AS
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Filing: 1971-01-22
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Granted: 1972-07-18
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Expires: 1991-01-22
Abstract
Abstract An electrolytic capacitor comprises a capacitance element consisting of a convolutely wound metal and spacer strip assembly, which is impregnated with an electrolyte and additionally impregnated with oil which also completely fills a metal can in which the capacitance element is enclosed.
Inventors
- 👤 Niels Hvidtfeldt
- 👤 Adam Ruttkay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:23
CPC Classifications
H; H01; H01G; H01G9/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
18 words
A capacitor as in claim 1, in which the depolarizing substance contained in said insulating oil is p-nitro-benzoeacid-ethylester.
Claim 2
Independent Claim
93 words
A method of manufacturing an electrolytic capacitor comprising the steps of winding at least one strip of pre-formed metal and a porous spacer strip to produce a convolutely wound assembly, impregnating said assembly with an electrolyte containing a depolarizing substance, applying a voltage higher than the intended maximum operating voltage between said metal strip and said electrolyte to post-form said metal strip, and impregnating said Assembly with an insulating oil which is not capable of solving components of said electrolyte and which contains a depolarizing substance different from that contained in said electrolyte.
Claim 3
Dependent Claim
18 words
A method as in claim 3, in which the depolarizing substance contained in said insulating oil is p-nitro-benzoeacid-ethylester.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |