- Patent Title: Discoloration resistant gold alloy and method of production thereof
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Application No.: US16970909Application Date: 2019-03-14
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Publication No.: US11889904B2Publication Date: 2024-02-06
- Inventor: Sergio Arnaboldi , Marta Rossini , Marco Nauer
- Applicant: ARGOR—HERAEUS SA
- Applicant Address: CH Mendrisio
- Assignee: Argor-Heraeus SA
- Current Assignee: Argor-Heraeus SA
- Current Assignee Address: CH Mendrisio
- Agency: Fish & Richardson P.C.
- Priority: CH 32718 2018.03.15
- International Application: PCT/IB2019/052076 2019.03.14
- International Announcement: WO2019/175826A 2019.09.19
- Date entered country: 2020-08-18
- Main IPC: A44C27/00
- IPC: A44C27/00 ; C22C5/02 ; C22F1/14
Abstract:
A discoloration resistant Gold alloy for jewelry characterized in that it comprises in weight:
Gold, in the amount comprised between 755‰ and 770‰,
Copper, in the amount comprised between 165‰ and 183‰,
Silver, in the amount comprised between 28‰ and 50‰,
Palladium, in the amount comprised between 19‰ and 23‰ and
Iron, in the amount comprised between 2‰ and 6‰.
and characterized by the absence of Vanadium.
Gold, in the amount comprised between 755‰ and 770‰,
Copper, in the amount comprised between 165‰ and 183‰,
Silver, in the amount comprised between 28‰ and 50‰,
Palladium, in the amount comprised between 19‰ and 23‰ and
Iron, in the amount comprised between 2‰ and 6‰.
and characterized by the absence of Vanadium.
Information query
