Discoloration-resistant timepiece or jewelry part

Details Discoloration-resistant timepiece or jewelry part Discoloration-resistant timepiece or jewelry part

2007-12-25

2007-12-25

Ip, Sikyin (Department: 1742)

Alloys or metallic compositions

Gold base

Platinum containing

C148S430000

Reexamination Certificate

active

10916853

ABSTRACT:
Timepiece or jewelry part manufactured in an alloy containing at least 75% gold by weight, from 21% to 23% copper by weight, and from 1% to 4% platinum by weight.

REFERENCES:
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patent: 54-132425 (1979-10-01), None
patent: 54132425 (1979-10-01), None

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