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:
Sep. 23, 2003
Filed:
Aug. 06, 2002
Shunji Watanabe, Chiba, JP;
Hideharu Onodera, Chiba, JP;
Tsugio Sakai, Chiba, JP;
Toyoo Harada, Chiba, JP;
Yoshimi Kanno, Chiba, JP;
Shinichi Takasugi, Chiba, JP;
Tsuneaki Tamachi, Chiba, JP;
Seiko Instruments inc., , JP;
Abstract
An electrical double layer capacitor has an electrolyte included of a non-aqueous solvent and a supporting salt dissolved in the non-aqueous solvent. A pair of polarizing electrodes are disposed in confronting relation with one another. A separator is disposed between the polarizing electrodes. The supporting salt contained in the electrolyte exists only in regions proximate a surface of the polarizing electrodes when the electrical double layer capacitor is fully charged. When the electrical double layer capacitor is charged at 3.3 V for 24 hours, a charged current after 24 hours is in the range of from about 5 &mgr;A/cm to about 22 &mgr;A/cm per unit area of the polarizing electrodes.