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. 11, 2001
Filed:
Dec. 21, 1999
Applicant:
Inventors:
Koji Sakata, Tokyo, JP;
Gaku Harada, Tokyo, JP;
Kazuya Mimura, Tokyo, JP;
Yutaka Nakazawa, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01G 9/04 ;
U.S. Cl.
CPC ...
H01G 9/04 ;
Abstract
In an electric double layer capacitor having a pair of polarizable electrodes containing activated carbon and auxiliary materials for giving electric conductivity to the polarizable electrodes, the auxiliary materials include at least two carbon materials such as epitaxially grown carbon fiber and granular graphite. An electric double layer capacitor having small internal resistance, large electrostatic capacitance and small variations of internal resistance and capacitance is realized by the auxiliary materials.