The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 1984
Filed:
Feb. 18, 1983
Richard W MacNamee, Pickens, SC (US);
Morris T Reese, Taylors, SC (US);
Emil F Blase, Pickens, SC (US);
Sangamo Weston, Inc., Springfield, IL (US);
Abstract
An essentially non-aqueous electrolyte composition for aluminum-anode capacitors is disclosed comprising ethylene glycol and a salt such as the ammonium or amine salt of an unsaturated dicarboxylic acid with or without a small amount of an additive such as boric acid, phosphoric acid, ammonium dihydrogen phosphate, ammonium pentaborate, ammonium phosphate and mixtures thereof. The electrolyte offers high electrical conductivity, and greatly increased stability and shelf life, under conditions of no voltage, for low voltage capacitors having high capacitance ratings. In one embodiment, the combination of ethylene glycol, as the solvent, with between about 0.001 to 0.1 mole of unsaturated dicarboxylic acid per mole of ethylene glycol and about 0.001 to 0.1 mole of the salt per mole of ethylene glycol is used. Other embodiments are disclosed.