Silver-colored alloy with low percentages of copper and zinc
US7128871B2 · kind B2 · utility
9Cited by
6References
16Claims
0Family size
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Inventor
Key dates
| Filing date | Feb 25, 2004 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Feb 25, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C5/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A silver-colored, tarnish-resistant, corrosion-resistant alloy is provided. The alloy includes 92.5–95% silver, combined with a master alloy of 24–34% zinc; 60–74% copper; 0.5–1.8% silicon; 0.0–8.0% tin, or 0.0–1.5% indium, wherein percentages are in terms of weight. The alloy can be used for jewelry items, tableware items, dental items or other items that should resist tarnishing or corrosion and which require a non-brittle alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.