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:
Nov. 07, 2000
Filed:
Jul. 28, 1995
Applicant:
Inventors:
Fusaji Kita, Otokuni-gun, JP;
Masaharu Higashiguchi, Otokuni-gun, JP;
Akira Kawakami, Takatsuki, JP;
Assignee:
Hitachi Maxell, Ltd., Osaka-Fu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429326 ; 4292314 ; 4292316 ;
Abstract
A non-aqueous secondary cell having a positive electrode, an electrolytic solution which contains an organic solvent, and a negative electrode which is made of a carbon material having a ratio of I.sub.O to I.sub.C at least 2, where I.sub.O is a peak intensity of oxygen atoms around 530-540 eV and I.sub.C is a peak intensity of carbon atoms around 285 eV in a photoelectron spectrum of an X-ray photoelectron spectroscopy under conditions of 12 kV and 10 mA, which cell has a small retention, a large capacity, and safety against ignition.