Metal treatment – Stock – Noble metal base
Reexamination Certificate
2005-08-30
2005-08-30
Ip, Sikyin (Department: 1742)
Metal treatment
Stock
Noble metal base
C148S431000, C420S502000, C420S503000
Reexamination Certificate
active
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.
Ishikawa Seiichiro
Suzuki Keiichi
Ip Sikyin
Jordan and Hamburg LLP
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