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. 10, 2003
Filed:
Sep. 30, 1999
Applicant:
Inventors:
Takeshi Ogasawara, Hirakata, JP;
Nobuyuki Higashiyama, Mino, JP;
Mutsumi Yano, Hirakata, JP;
Mamoru Kimoto, Hirakata, JP;
Yasuhiko Itoh, Yawata, JP;
Koji Nishio, Hirakata, JP;
Assignee:
Sanyo Electric Co., Ltd., Moriguchi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/32 ;
U.S. Cl.
CPC ...
H01M 4/32 ;
Abstract
A positive active material for sealed alkaline storage batteries is obtainable by subjecting &bgr;-nickel hydroxide, together with at least one additive selected from yttrium, gadolinium, erbium and ytterbium, and oxides, hydroxides, fluorides and chlorides thereof, to an oxidation treatment with an oxidizing agent in an aqueous alkaline solution. The positive active material contains nickel with a valence number in a range from 2.1 to 3.4.