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. 10, 2001
Filed:
Jan. 14, 1999
Applicant:
Inventors:
Naohiro Sonobe, Iwaki, JP;
Aisaku Nagai, Iwaki, JP;
Tomoyuki Aita, Iwaki, JP;
Minoru Noguchi, Wako, JP;
Manabu Iwaida, Wako, JP;
Eisuke Komazawa, Wako, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 3/102 ;
U.S. Cl.
CPC ...
C01B 3/102 ;
Abstract
A carbonaceous electrode material for electric double layer capacitors having a large capacitor per volume, a low resistivity and a large bulk density, is provided as a carbonaceous material having a specific surface area of 800-2000 m,/g as measured by the nitrogen adsorption BET method, and an average layer-plane spacing of at most 0.36 nm as measured by the X-ray diffraction method. The carbonaceous material is preferably produced by carbonizing and activating a carbon precursor of pitch origin in an oxidizing atmosphere.