US4539146A
Expired / Lapsed
US
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Electrolyte for electrolytic capacitors
Assignee: Emhart Industries Inc
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Filing: 1984-08-13
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Granted: 1985-09-03
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Expires: 2004-08-13
Abstract
Abstract An electrolyte for an electrolytic capacitor includes a mixture of about 10 grams of boric acid mixed with about 1 liter of a 38% sulfuric acid solution.
Inventors
- 👤 Brian Melody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:16
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
An electrolyte consisting of a liquid solution of from about 3.0 to about 4.5 mol/lit sulfuric acid and from about 0.05 to about 0.30 mol/lit boric acid.
Claim 2
Dependent Claim
27 words
An electrolyte consisting of a liquid solution of from about 3.0 to about 4.5 mol/lit sulfuric acid and from about 0.05 to about 0.30 mol/lit boric acid.
Claim 3
Dependent Claim
29 words
The electrolyte of claim 1 wherein the sulfuric acid is from about 3.4 to about 4.1 mol/lit and the boric acid is from about 0.1 to about 0.2 mol/lit.
Claim 4
Dependent Claim
43 words
An electrolyte for use in an eletrolytic capacitor having an anode composed of a dielectric oxiode film-forming metal consisting of a liquid solution of from about 3.0 to about 4.5 mol/lit sulfuric acid and from about 0.5 to about 0.30 mol/lit boric acid.
Claim 5
Dependent Claim
43 words
An electrolyte for use in an eletrolytic capacitor having an anode composed of a dielectric oxiode film-forming metal consisting of a liquid solution of from about 3.0 to about 4.5 mol/lit sulfuric acid and from about 0.5 to about 0.30 mol/lit boric acid.
Claim 6
Dependent Claim
31 words
The electrolyte of claim 3 wherein the sulfuric acid is from about 3.4 to about 4.1 mol/lit sand the boric acid is from about 0.1 to about 0.2 mol/lit boric acid.
Claim 7
Dependent Claim
13 words
The electrolyte of claim 4 wherein the dielectric oxide film-forming metal is tantalum.
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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |