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US 12,435,390 B2Granted
Timepiece, piece of jewellery or gemstone jewellery made of gold
AssigneeMontres Breguet S.A.
InventorsDenis Vincent, Stéphane Lauper, Gregory Kissling
Life of this patent
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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.
Claims20
A gold alloy, consisting of, by weight:
- gold in a range of from 73 to 77%;
- silver in a range of from 5 to 9.9% silver;
- palladium in a range of from 1 to 4.9%;
- copper in a range of from 10 to 18%;
- and
- optionally, iridium, rhenium, and/or ruthenium in up to 0.05%.
3 more elements
A gold alloy, comprising, by weight:
- the gold in a range of from 73 to 77%;
- the silver in a range of from 5.4 to 9.9% silver;
- the palladium in a range of from 1 to 4.9%;
- the copper in a range of from 10 to 18%;
- and
- optionally, iridium, rhenium, and/or ruthenium in up to 0.05%,
- wherein the gold alloy has, in CIELAB color space, an a* value in a range of from 5.5 to 8, a b* value in a range of from 14 to 17, and an L value in a range of from 80 to 90, and
- wherein the gold alloy has a hardness HV1 in a range of from 155 to 180.
5 more elements
Dependencies are inferred from the claim text.