Gold alloy with copper, silver and zinc
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United States of America Patent
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-
Jun 30, 1981
Grant Date -
N/A
app pub date -
Jan 7, 1980
filing date -
Jan 18, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gold alloy classified into 8 to 12 carats contains 30.0 to 50.0% by weight of gold and the remainder is an alloying composition which includes 75.2-77.1% of copper, 13.6 to 16.2% of silver and 6.7 to 11.2% of zinc. The preferred alloys are 9 and 10 carats. The alloys exhibit satisfactory color tone and luster and have improved physical and chemical properties including workability, hardness, chemical resistance and perspiration resistance. The alloys are fabricated into articles which are surface finished by buffing or electrolytic polishing.
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