Electrolyte for electrolytic capacitors and electrolytic capacitor using the electrolyte
US4821153A · kind A · utility
7Cited by
7References
33Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 21, 1987 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Oct 21, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G9/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to an electrolyte for use in electrolytic capacitors and also to an electrolytic capacitor using the electrolyte. The solute for the electrolyte is a quaternary ammonium salt of either a carboxylic acid selected from the group consisting of phthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid and maleic acid, or an alkyl or nitro-substituted compound of the acid. The electrolytic capacitor has improved low temperature characteristics and an improved variation in characteristics at high temperatures in relation to time with a prolonged life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.