US3585459A
Expired / Lapsed
US
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Capacitor with electrolyte comprising boric acid and pentanediol
Assignee: SPRAQUE ELECTRIC CO
•
Filing: 1969-10-02
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Granted: 1971-06-15
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Expires: 1989-10-02
Abstract
Abstract An electrolytic capacitor has a capacitor section having a plurality of electrodes, at least one electrode of which is a valve metal having on its surface an insulating oxide layer, said section being impregnated with an electrolyte. The electrolyte comprises a solvent and an ionogen of a mixture of boric acid and a pentanediol, wherein the mol ratio of boric acid to said pentanediol is between about 0.2-2.
Inventors
- 👤 Reginald G Hills
- 👤 Robert W Santway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:12
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
10 words
The capacitor of claim 1 wherein said pentanediol is 2-methyl-2,4-pentanediol.
Claim 2
Dependent Claim
31 words
The capacitor of claim 1 wherein said ionogen includes an equimolar proportion of a radical selected from the group consisting of alkali metal, ammonium, quaternary ammonium and C1-C18 hydrocarbyl amine radicals.
Claim 3
Dependent Claim
31 words
The capacitor of claim 2 wherein said ionogen includes an equimolar proportion of a radical selected from the group consisting of alkali metal, ammonium, quaternary ammonium and C1-C18 hydrocarbyl amine radicals.
Claim 4
Dependent Claim
36 words
The capacitor of claim 1 wherein said solvent is a member of the group consisting of dimethylformamide, dimethylacetamide and dimethylpropionamide; and wherein said electrolyte includes equimolar proportions of a C1-C10 aliphatic acid and an organic amine.
Claim 5
Dependent Claim
10 words
The capacitor of claim 5 wherein said pentanediol is 2-methyl-2,4-pentanediol.
Claim 6
Dependent Claim
31 words
The capacitor of claim 5 wherein said ionogen includes an equimolar proportion of a radical selected from the group consisting of alkali metal, ammonium, quaternary ammonium and C1-C18 hydrocarbyl amine radicals.
Claim 7
Dependent Claim
31 words
The capacitor of claim 6 wherein said ionogen includes an equimolar proportion of a radical selected from the group consisting of alkali metal, ammonium, quaternary ammonium and C1-C18 hydrocarbyl amine radicals.
Claim 8
Dependent Claim
25 words
The capacitor of claim 1 wherein said ionogen includes from 0.5-5.0 mol percent of a vicinal aromatic diol and the pentanediol proportion is correspondingly reduced.
Claim 9
Dependent Claim
16 words
The capacitor of claim 9 wherein said pentanediol is 2-methyl-2,4-pentanediol and said aromatic diol is 2,3-naphthalenediol.
Claim 10
Dependent Claim
36 words
The capacitor of claim 9 wherein said solvent is a member of the group consisting of dimethylformamide, dimethylacetamide and dimethylpropionamide; and wherein said electrolyte includes equimolar proportions of a C1-C10 aliphatic acid and an organic amine.
Claim 11
Dependent Claim
31 words
The capacitor of claim 9 wherein said ionogen includes an equimolar proportion of a radical selected from the group consisting of alkali metal, ammonium, quaternary ammonium and C1-C18 hydrocarbyl amine radicals.
Claim 12
Dependent Claim
36 words
The capacitor of claim 9 wherein said solvent is a member of the group consisting of dimethylformamide, dimethylacetamide and dimethylpropionamide; and wherein said electrolyte includes equimolar proportions of a C1-C10 aliphatic acid and an organic amine.
Claim 13
Dependent Claim
16 words
The capacitor of claim 13 wherein said pentanediol is 2-methyl-2,4-pentanediol and said aromatic diol is 2,3-naphthalenediol.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |