Alloys or metallic compositions – Gold base
Patent
1991-04-09
1992-08-18
Roy, Upendra
Alloys or metallic compositions
Gold base
420508, 420509, 420510, 420512, C22C 500
Patent
active
051397390
ABSTRACT:
A gold alloy for black coloring comprising gold and at least one coloring metallic element selected from the group consisting of Cu, Fe, Co, and Ti, a gold alloy for black coloring having the composition described above and further comprising at least one alloying element selected from the group consisting of Pt, Pd, Rh, Ir, Ru, Os, Ag, and Ni; a method for the production of a processed article of gold alloy possessing a black surface layer by the steps of shaping the gold alloy mentioned above, heat-treating the shaped gold alloy, and cooling; and processed article of gold alloy obtained by the method.
REFERENCES:
patent: 3189482 (1965-06-01), Bajars et al.
McDonald et al., Gold Bulletin, vol. 11, (Jul. 1978) 66.
Ott et al., Gold Bull. 18 (1985) 140.
Susz et al., Gold Bull. 13 (1980) 15.
MacCormack et al., Gold Bull. 14 (1981) 19.
German et al., Gold Bull., vol. 13 (1980) 113.
Morita Noboru
Seki Chusei
Takayanagi Takeshi
Agency of Industrial Science and Technology
Ministry of International Trade and Industry
Roy Upendra
Seki Company
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