Silver-colored alloy with low percentages of copper and zinc

Details Silver-colored alloy with low percentages of copper and zinc Silver-colored alloy with low percentages of copper and zinc

2006-10-31

2006-10-31

Wyszomiersk, George (Department: 1742)

Alloys or metallic compositions

Silver base

Copper containing

C420S502000

Reexamination Certificate

active

07128871

ABSTRACT:
A silver-colored, tarnish-resistant, corrosion-resistant alloy is provided. The alloy includes 92.5–95% silver, combined with a master alloy of 24–34% zinc; 60–74% copper; 0.5–1.8% silicon; 0.0–8.0% tin, or 0.0–1.5% indium, wherein percentages are in terms of weight. The alloy can be used for jewelry items, tableware items, dental items or other items that should resist tarnishing or corrosion and which require a non-brittle alloy.

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patent: 6726877 (2004-04-01), Eccles
Harada Takeshi, Electrical Contact Material, Abstract of Japanese Patent No. JP59038346, Mar. 2, 1984.
Kasai Toshiro et al., Sulfidization-Resisting Silver Alloy, Abstract of Japanese Patent No. JP62243725, Oct. 24, 1987.

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