High strength, tarnish resistant composition of matter

Details High strength, tarnish resistant composition of matter High strength, tarnish resistant composition of matter

2005-03-01

2005-03-01

Ip, Sikyin (Department: 1742)

Metal treatment

Stock

Noble metal base

C148S431000, C420S502000, C420S503000

Reexamination Certificate

active

06860949

ABSTRACT:
A high strength, tarnish resistant composition of matter includes approximately 90 percent Ag, 3 to 5 percent Pt and 7 to 5 percent Cu. In a preferred embodiment, the composition of matter includes 90 percent Ag, 3 percent Pt and 7 percent Cu. In another preferred embodiment, the composition of matter includes 90 percent Ag, 5 percent Pt and 5 percent Cu.

REFERENCES:
patent: 5876862 (1999-03-01), Shibuya et al.
patent: 6723281 (2004-04-01), Ueno et al.

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