TIMEPIECE, PIECE OF JEWELLERY OR GEMSTONE JEWELLERY MADE OF GOLD
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United States of America Patent
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Issued Date -
Dec 21, 2023
app pub date -
Jul 23, 2021
filing date -
Dec 18, 2020
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Abstract
A gold alloy may contain, by weight, between 73% and 77% of gold, between 5% and 11% of silver, between 1% and 7% of palladium, and between 10% and 18% of copper. The gold alloy may include iridium, rhenium, and/or ruthenium in up to 0.05 wt. %. The gold alloy may have an a* value in a range of from 3 to 9, and a b* value in a range of from 12 to 18, in CIELAB color space. A timepiece, piece of jewelry, or gemstone jewelry, may be made of such a gold alloy.
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