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. 26, 2001
Filed:
Feb. 25, 1999
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P 1/300 ;
U.S. Cl.
CPC ...
B23P 1/300 ;
Abstract
According to the present invention, an inexpensive iron sintered substrate used for alkaline storage batteries which has three-dimensionally intercommunicating spaces is improved, and inexpensive alkaline storage batteries using the substrate are provided. The electrode used for the alkaline storage batteries includes an iron powder sintered substrate having three-dimensionally intercommunicating spaces and plated with nickel and an active material powder filled in the space of the substrate, wherein an oxide film obtained by previously oxidizing iron per se is formed on the surface portions of the substrate which are not plated with nickel.