Silver alloy with color fastness

Metal treatment – Stock – Noble metal base

Reexamination Certificate

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Details

C148S431000, C420S502000, C420S503000

Reexamination Certificate

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06936117

ABSTRACT:
A silver alloy with color fastness includes silver as major component; and a small quantity of copper, zinc and nickel so that it can be prevented to oxidize, and it can use metal with easy procurement without special metal and manufacture a alloy with color fastness.

REFERENCES:
patent: 5972131 (1999-10-01), Asada et al.
patent: 6245166 (2001-06-01), Shibuya et al.

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