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:
Oct. 19, 1999
Filed:
Mar. 23, 1998
Applicant:
Inventors:
Takeshi Kawasato, Yokohama, JP;
Manabu Suhara, Yokohama, JP;
Kazuya Hiratsuka, Yokohama, JP;
Manabu Tsushima, Yokohama, JP;
Assignee:
Asahi Glass Company Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01G / ;
U.S. Cl.
CPC ...
361502 ; 361505 ; 361504 ; 429335 ; 429326 ;
Abstract
An electric double layer capacitor including electrodes made of carbon material as the main component, and an electrolyte capable of forming an electric double layer at the interface with the electrodes, wherein the electrolyte includes an organic type mixed solvent containing propylene carbonate and an asymmetrical chain carbonic acid ester represented by the general formula R.sup.1 OC(.dbd.O)OR.sup.2, wherein R.sup.1 and R.sup.2 are mutually different monovalent organic groups, and a solute comprising a quaternary onium salt.