Tarnish resistant gold colored alloy with enhanced gold color
US4948557A · kind A · utility
3Cited by
3References
9Claims
0Family size
Inventor
Key dates
| Filing date | Feb 1, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Feb 1, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C30/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A gold colored, tarnish and corrosion resistant alloy is disclosed, usable for jewelry, dental purposes and the like. The alloy consists essentially of 24 to 27 percent palladium, 19 to 22 percent indium, 5 to 30 percent copper, 1 to 20 percent gold, and the balance is essentially silver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.