Metal-graphite brush
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United States of America Patent
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Sep 27, 2005
Grant Date -
Jul 10, 2003
app pub date -
Dec 24, 2002
filing date -
Dec 26, 2001
priority date (Note) -
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Abstract
A metal-graphite brush comprises a brush body which is made by mixing and molding metal powder and graphite powder. 2 mg to 30 mg as amounts of phosphate ion of at least one of phosphoric acid and a phosphate compound is added to 1 g of the brush body of the metal-graphite brush.
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