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US 2014/0271340 A1Published application
Silver alloy
AssigneeJohnson Matthey Public Limited Company
InventorsThierry Cpponex, Kang Ping Haung
Life of this patent
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Abstract
A silver alloy with exceptional resistance to both tarnishing and firestain includes at least 92.50% silver, from 0.70 to 1.65% germanium, from 1.30 to 1.80% indium, from 0.000 to 0.015% boron, not more than 1.0% palladium and not more than 0.20% copper.
Claims10
1-6. (canceled)
A silver alloy comprising at least 92.50% silver, from 0.70 to 1.65% germanium, from 1.30 to 1.80% indium, from 0.000 to 0.015% boron, not more than 1.0% palladium and not more than 0.02% copper.
Dependencies are inferred from the claim text.