# US 11,441,210 B2 · Timepiece or piece of jewellery or gemstone jewellery made of gold

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- Number: US 11,441,210 B2
- Document ID: US11441210B2
- Status: Granted
- Kind: B2
- Application number: 16/841,738
- Filed: 2020-04-07
- Published: 2021-02-25
- Granted: 2022-09-13
- Earliest claimed: 2019-08-23
- Assignees: Omega SA
- Applicants: Omega SA
- Inventors: Denis Vincent; Gregory Kissling; Christian Charbon; Vincent Fays; Stephane Lauper
- Web page: https://patentgrep.com/patent/US11441210B2

## CPC

- C22C 30/02: containing copper
- A44C 27/003: {Metallic alloys (alloys in general C22C)}
- C22C 5/02: Alloys based on gold
- C22C 9/00: Alloys based on copper
- G04B 37/22: Materials or processes of manufacturing pocket watch or wrist watch cases {(machines or tools for the manufacture of clockwork cases G04D3/0064, G04D3/0097, G04D3/029; decoration or tools therefor G04B45/0076)}
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- A44C: PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- G04B: MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at pre-selected times or after predetermined time intervals G04C23/00; clocks or watches with stop devices G04F7/08)

## Abstract

A zinc-free gold alloy containing by weight between 37% and 38.5% of gold, between 4 and 32% of palladium and/or silver, between 25% and 54% of copper and between 0% and 10% of gallium. A timepiece or piece of jewellery or gemstone jewellery made of this alloy.

## Claims

### Claim 1

A zinc-free gold alloy containing by weight between 37.5% and 38.5% of gold; palladium and/or silver in a total percentage comprised between 4% and 32%, between 39% and 54% of copper and between 0% and 10% of gallium.

### Claim 2 (depends on 1)

The gold alloy according to claim 1, wherein said alloy contains by weight between 37.5% and 38.5% of gold; palladium and/or silver in a total percentage comprised between 5% and 26%, between 39% and 53% of copper and between 0% and 8.5% of gallium.

### Claim 3 (depends on 1)

The gold alloy according to claim 1, wherein said alloy contains by weight between 37.5% and 38.5% of gold; palladium and/or silver in a total percentage comprised between 6% and 19.5%, between 39% and 52% of copper and between 2% and 7% of gallium.

### Claim 4 (depends on 1)

The gold alloy according to claim 1, wherein said alloy contains by weight between 37.5% and 38.5% of gold; palladium and/or silver in a total percentage comprised between 7% and 17%, between 41% and 52% of copper and between 7% and 6% of gallium.

### Claim 5 (depends on 1)

The gold alloy according to claim 1, wherein said alloy contains by weight between 37.5% and 38.5% of gold; palladium and/or silver in a total percentage comprised between 7% and 14.5%, between 44% and 51% of copper and between 2% and 6% of gallium.

### Claim 6 (depends on 1)

The gold alloy according to claim 1, wherein said alloy contains by weight between 37.5% and 38.5% of gold, between 0 and 5% of palladium, between 4 and 27% of silver, between 39% and 54% of copper and between 0% and 10% of gallium.

### Claim 7 (depends on 1)

The gold alloy according to claim 1, wherein said alloy contains by weight between 37.5% and 38.5% of gold, between 0% and 5% of palladium, between 4% and 12% of silver, between 45% and 51% of copper and between 3% and 5% of gallium.

### Claim 8 (depends on 7)

The gold alloy according to claim 7, wherein said alloy contains 2 wt. % of palladium.

### Claim 9 (depends on 1)

The gold alloy according to claim 1, wherein said alloy contains by weight a maximum of 0.05% of an element selected from among iridium, rhenium and ruthenium.

### Claim 10 (depends on 1)

The gold alloy according to claim 1, wherein said alloy is free of nickel, cobalt, iron and manganese.

### Claim 11 (depends on 1)

The gold alloy according to claim 1, wherein in the CIELAB colour lab space said alloy has an a* value comprised between 1 and 8 and a b* value comprised between 12 and 18.

### Claim 12 (depends on 1)

The gold alloy according to claim 1, wherein in the CIELAB colour lab space said alloy has an a* value comprised between 5.5 and 7.5 and a b* value comprised between 14 and 16.

### Claim 13 (depends on 1)

The gold alloy according to claim 1, wherein said alloy has a hardness HV1 comprised between 125 and 180.

### Claim 14

A timepiece or piece of jewellery or gemstone jewellery made of a Zinc-free gold alloy containing by weight between 37.5% and 38.5% of gold; palladium and/or silver in a total percentage comprised between 4% and 32%, between 39% and 54% of copper and between 0% and 10% of gallium.