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:
Oct. 19, 2004
Filed:
Jul. 26, 2002
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The following steps are conducted: preparing a metal salt carried-substrate A by soaking a sintered nickel substrate in an acidic solution containing cobalt ions and at least one metal ions of magnesium ions, iron ions and manganese ions, and drying thus soaked substrate; preparing a hydroxide carried-substrate B by soaking the substrate A in an alkaline solution to deposit cobalt hydroxide and at least one metal hydroxide of magnesium hydroxide, iron hydroxide and manganese hydroxide in the pores and on the surface of the substrate A; obtaining an oxide carried-substrate C by oxidizing the cobalt hydroxide to produce cobalt oxide having a mean cobalt valence of over 2; and obtaining an active material carried-substrate D by soaking the substrate C in a solution containing nickel nitrate dissolved therein, drying thus soaked substrate C, and then soaking thus dried substrate C in an alkaline solution, to fill the active material in the substrate C.