US4762632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolyte for electrolytic capacitor
Assignee: Nippon Chemi Con Corp
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Filing: 1987-03-17
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Granted: 1988-08-09
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Expires: 2007-03-17
Abstract
Abstract An electrolyte for an electrolytic capacitor is disclosed containing an alkyl quarternary ammonium salt of an enol-form of 1,3-diketone compound as solute within an aprotic solvent. The electrolyte exhibits high conductivity while eliminating the drawbacks associated with the presence of water.
Inventors
- 👤 Fumihiko Shinozaki
- 👤 Tatsunori Tsuji
- 👤 Yutaka Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:24
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/02; H01G9/022
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
An electrolyte for an electrolytic capacitor comprising an aprotic solvent and an alkyl ammonium salt of an enol-form of 1,3-diketone compound of general formula, ##STR7## in which R 1 and R 2 are alkyl group having 1 to 6 carbon atoms or aryl group, R 3 is hydrogen atom, alkyl group having 1 to 6 carbon atoms or aryl group and A is alkyl ammonium comprising 1 to 4 alkyl groups having 1 to 6 carbon atoms.
Claim 2
Dependent Claim
77 words
An electrolyte for an electrolytic capacitor comprising an aprotic solvent and an alkyl ammonium salt of an enol-form of 1,3-diketone compound of general formula, ##STR7## in which R 1 and R 2 are alkyl group having 1 to 6 carbon atoms or aryl group, R 3 is hydrogen atom, alkyl group having 1 to 6 carbon atoms or aryl group and A is alkyl ammonium comprising 1 to 4 alkyl groups having 1 to 6 carbon atoms.
Claim 3
Dependent Claim
41 words
An electrolyte for an electrolytic capacitor according to claim 1, wherein the aprotic solvent is selected from the group of N-methylformamide, N,N-dimethylformamide, N-ethylformamide, N,N-diethylformamide, N-methylacetamide, N,N-dimethylacetamide, N-ethylacetamide, N,N-diethylacetamide, γ-butyrolactone, N-methyl-2-pyrrolidone, ethylene carbonate, propylene carbonate, dimethyl sulfoxide, acetonitrile or the mixture thereof.
Claim 4
Dependent Claim
26 words
An electrolyte for an electrolytic capacitor according to claim 1, wherein the 1,3-diketone compound is selected from the group of acetylacetone, benzoylacetone, dibenzoylmethane, di-tert-butyl-acetylacetone or 3-methyl-2,4-pentanedione.
Claim 5
Dependent Claim
26 words
An electrolyte for an electrolytic capacitor according to claim 1, wherein the alkyl ammonium is selected from the group of tetramethylammonium, tetraethylammonium, tetrabutylammonium, trimethylammonium, dihexylammonium, hexylammonium.
References Cited (Backward Citations)
US3052829A
Cited
US4107761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |