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:
Jun. 03, 2003
Filed:
Jul. 03, 2001
Applicant:
Inventors:
Masatoshi Majima, Osaka, JP;
Shinji Inazawa, Osaka, JP;
Satoshi Ujiie, Osaka, JP;
Eriko Yagasaki, Osaka, JP;
Kazuharu Danjo, Okayama, JP;
Shinichi Homma, Okayama, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/02 ;
U.S. Cl.
CPC ...
H01M 4/02 ;
Abstract
Modified graphite particles are described, which have an almost circular and tabular shape, an average particle size Ap of 12 to 18 &mgr;m, a BET specific surface area Ss of 4 to 6 m /g, and a BET specific surface area to average particle size ratio, Ss/Ap, of 0.35 or less, and which are obtained by treating tabular particles of lumpy or flaky graphite to break or slightly fold the periphery of the tabular particles to increase the degree of circularity. A battery having the modified graphite particles as an anode active material is also described.