Platinun alloy composition for a spark plug electrode for an internal combustion engine
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United States of America Patent
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Issued Date -
Apr 8, 2004
app pub date -
Aug 13, 2003
filing date -
Feb 14, 2001
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Abandoned
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Abstract
A platinum alloy composition for the central electrode (1) of a spark plug for a spark ignition engine, the composition further comprising in percentage by weight: about 5% to 15% iridium; and about 0.1% to 5% of an element selected from the group comprising: hafnium, zirconium, and mixtures thereof.
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