US3609467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic capacitor and electrolyte material therefor
Assignee: General Electric Co
•
Filing: 1970-04-17
•
Granted: 1971-09-28
•
Expires: 1990-04-17
Abstract
Abstract A substantially nonaqueous liquid electrolyte for electrolytic capacitors consisting essentially of a major proportion of a solvent such as ethylene glycol, a minor proportion of an ionogen which is the reaction product ester of an organic base and of an acid such as a mono-, di-, or tri-basic organic acid, or the hydroxy substituted derivatives of these acids, the ionogen preferably being dimethylethanolamine adipate (DMEA), and a small but effective amount of an alkanolamine phosphate. The concentration of the ester in the electrolyte can be from about 0.1%-25% by weight. The concentration of the alkanolamine phosphate may be about 0.1%-6.0% by weight. The electrolyte exhibits a low vapor pressure and enhanced chemical and electrical stability at elevated temperatures, and is characterized by a high breakdown voltage and long life electrical stability.
Inventors
- 👤 James H Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:31
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
32 words
1%-6.0% BY WEIGHT. THE ELECTROLYTE EXHIBITS A LOW VAPOR PRESSURE AND ENHANCED CHEMICAL AND ELECTRICAL STABILITY AT ELEVATED TEMPERATUES, AND IS CHARACTERIZED BY A HIGH BREAKDOWN VOLTAGE AND LONG LIFE ELECTRICAL STABILITY.
Claim 2
Dependent Claim
38 words
An electrolyte as claimed in claim 1, wherein the solvent is ethylene glycol, and the concentration of said alkanolamine phosphate is from about 0.1 percent by weight up to the solubility limit of said phosphate in ethylene glycol.
Claim 3
Dependent Claim
21 words
An electrolyte as claimed in claim 1, wherein the concentration of said phosphate is from about 0.1- 6.0 percent by weight.
Claim 4
Dependent Claim
19 words
An electrolyte as claimed in claim 1, wherein the concentration of said phosphate is about 0.2 percent by weight.
Claim 5
Dependent Claim
13 words
An electrolyte as claimed in claim 4, wherein said ionogen is dimethylethanolamine adipate.
Claim 6
Dependent Claim
18 words
An electrolyte as claimed in claim 1, including a solvent compatible with ethylene glycol and with said phosphate.
Claim 7
Dependent Claim
45 words
An electrolyte, as claimed in claim 6, wherein said electrolyte composition contains, by weight, about: Ethylene glycol 84.8% Dimethylethanolamine adipate 15.0% and from 0.1 to 6.0 percent of said alkanolamine phosphate, said phosphate being at least one compound selected from the group TEAP and DEAP.
Claim 8
Dependent Claim
77 words
An electrolytic capacitor comprising a pair of electrodes, at least one of said electrodes being composed of a film-forming metal having a dielectric film thereon, and an electrolyte comprising a major proportion of a solvent, a minor proportion of an ionogen dissolved therein and an alkanolamine phosphate in said electrolyte, the concentration of said alkanolamine phosphate in said electrolyte being from about 0.1 percent by weight up to the solubility limit of said phosphate in said solvent.
Claim 9
Dependent Claim
41 words
An electrolytic capacitor as claimed in claim 8, wherein said solvent is ethylene glycol and the concentration of said phosphate in said electrolyte is from about 0.1 percent by weight up to the solubility limit of said phosphate in ethylene glycol.
Claim 10
Dependent Claim
25 words
An electrolytic capacitor as claimed in claim 8, wherein the concentration of said phosphate in said electrolyte is from about 0.1- 6.0 percent by weight.
Claim 11
Dependent Claim
22 words
An electrolyte capacitor as claimed in claim 8, wherein the concentration of said phosphate in said electrolyte is 0.2 percent by weight.
Claim 12
Dependent Claim
14 words
An electrolytic capacitor as claimed in claim 11, wherein said ionogen is dimethylethanolamine adipate.
Claim 13
Dependent Claim
22 words
An electrolytic capacitor as claimed in claim 8, wherein said electrolyte includes a solvent compatible with ethylene glycol and with said phosphate.
Claim 14
Dependent Claim
50 words
An electrolytic capacitor as claimed in claim 13, wherein said electrolyte composition, by weight, essentially containing approximately: Ethylene glycol 84.8% Dimethylethanolamine adipate 15.0% and from 0.1 percent to 6.0 percent of said alkanolamine phosphate, said phosphate being at least one compound selected from the group: Triethanolamine phosphate and diethanolamine phosphate.
Claim 15
Dependent Claim
40 words
An electrolyte as set forth in claim 1, wherein said electrolyte contains essentially dimethylethanolamine adipate and from 0.1 to 6.0 percent of triethanolamine phosphate (TEAP) in an aqueous environment so as to inhibit hydrogen gas formation by electrolysis of water.
Claim 16
Dependent Claim
31 words
An electrolyte as set forth in claim 1, wherein said electrolyte contains essentially dimethylethanolamine phosphate (DEAP) in an aqueous environment so as to inhibit hydrogen gas formation by electrolysis of water.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |