US 12,435,390 B2
Timepiece, piece of jewellery or gemstone jewellery made of gold
Denis Vincent, Neuchatel (CH); Stéphane Lauper, Cortaillod (CH); and Gregory Kissling, La Neuveville (CH)
Assigned to MONTRES BREGUET SA, L'Abbaye (CH)
Appl. No. 18/252,144
Filed by MONTRES BREGUET SA, L'Abbaye (CH)
PCT Filed Jul. 23, 2021, PCT No. PCT/EP2021/070732
§ 371(c)(1), (2) Date May 8, 2023,
PCT Pub. No. WO2022/128178, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 20215708 (EP), filed on Dec. 18, 2020.
Prior Publication US 2023/0407438 A1, Dec. 21, 2023
Int. Cl. C22C 5/02 (2006.01); A44C 27/00 (2006.01); G04B 37/22 (2006.01)
CPC C22C 5/02 (2013.01) [A44C 27/003 (2013.01); G04B 37/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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%.