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:
Jul. 22, 2014
Filed:
Jun. 13, 2006
Yasuyuki Higaonna, Kakegawa, JP;
Tetsuya Kume, Kakegawa, JP;
Yasunari Iwata, Kakegawa, JP;
Makoto Takeuchi, Kunitachi, JP;
Yasuyuki Higaonna, Kakegawa, JP;
Tetsuya Kume, Kakegawa, JP;
Yasunari Iwata, Kakegawa, JP;
Makoto Takeuchi, Kunitachi, JP;
Cataler Corporation, Shizuoka, JP;
Advanced Capacitor Technologies, Inc., Akishima-shi, JP;
Abstract
A carbonaceous material used as a polarizable active material in an electric double layer capacitor is characterized in that, when measured by an electron spin resonance method without adding any additives, the obtained peak line width is 2 mT or less, and the peak intensity, which is converted into a number of unpaired electrons per 1 g, is 1×10or more. A method for producing the carbonaceous material includes removing residual functional groups from the carbonaceous material so that reactions between the residual functional groups and the electrolytic liquid are suppressed when forming a capacitor.