14K gold alloy with silver, copper, zinc and cobalt

Details 14K gold alloy with silver, copper, zinc and cobalt 14K gold alloy with silver, copper, zinc and cobalt

1996-09-03

1998-05-12

Wyszomierski, George

Metal treatment

Stock

Noble metal base

420511, C22C 502

Patent

active

057499799

ABSTRACT:
A 14K gold alloy includes by weight percentages about 58.5 to 58.8% gold, 12.8 to 14.4% silver, 22.9 to 24.8% copper, 3.5 to 4.1% zinc and 0.2 to 0.5% cobalt. The alloy exhibits a relatively large uniform, fine grain size and may be repetitively hardened and softened as desired. The brightness of the alloy is exceptional and the color, which is quite distinctive among 14K gold alloys, is similar to rich colored 18K gold alloys.

REFERENCES:
patent: 2169592 (1939-08-01), Peterson
patent: 2248100 (1941-07-01), Loebich
patent: 3981723 (1976-09-01), Tuccillo
patent: 5173132 (1992-12-01), Solomon
patent: 5180551 (1993-01-01), Agarwal
"Grain Refining in 14K Gold Alloys" by L. Gal-Or and M. Riabkina-Fishman, The Sante Fe Symposium on Jewelry Manufacturing Technology (1987), Ed. by D. Schneller, Met-Chem Research Inc., Boulder Colorado (1988), pp. 125-141 .

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