Invention Grant
- Patent Title: Tarnish and sweat resistant low karat gold alloys
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Application No.: US17808702Application Date: 2022-06-24
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Publication No.: US11629391B2Publication Date: 2023-04-18
- Inventor: William Guenley , Mossig H. Makhoulian , Joe Esposito , Luke Autry , Scott Suvall
- Applicant: LeachGarner, Inc.
- Applicant Address: US MA Attleboro
- Assignee: LeachGarner, Inc.
- Current Assignee: LeachGarner, Inc.
- Current Assignee Address: US MA Attleboro
- Agency: Gottlieb, Rackman & Reisman, P.C.
- Main IPC: C22C9/00
- IPC: C22C9/00 ; C22F1/08 ; C22C5/02

Abstract:
This invention provides low karat, low silver, 6 kt gold-copper-zinc alloys with acceptable workability that can be processed into wire, tube, sheet stock, or cast. The alloys are annealed at 1200° F., rapidly cooled, and heat treated at about 600° to 800° F., which increases the hardness and durability in finished parts made from these alloys. The alloys include grain refiners. The alloys are resistant to oxidation from sweat and tarnishing. Additional fabrication operations can form jewelry items such as balls, chain, hoops and studs.
Public/Granted literature
- US20220325381A1 TARNISH AND SWEAT RESISTANT LOW KARAT GOLD ALLOYS Public/Granted day:2022-10-13
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