KARATIUM STERLING
US20100008818A1
2010-01-14
12/353,232
2009-01-13
Abstract:
A sterling silver jewelry alloy that has approximately 0.01-7.50% fine gold content that has similar color huge and shine and characteristics of sterling silver. Karatium Sterling is a unique alloy blend that will provide the traditional sterling silver jewelry designer with a special metal that is slightly more tarnish resistant than traditional sterling silver. The alloy has the following compositions by weight; Gold 0.01.00-7.50%, Silver 92.50-97.50%, Copper 0.01-7.00%. In addition to its nice silver color it also polishes easier with a better luster and provides jewelry craftsmen a slightly higher cost silver alloy that responds well to the jewelry manufacturing process (e.g., casting, milling, soldering, tooling, stone setting, polishing and plating).
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Classification:
C22C5/08 » CPC main
Alloys based on noble metals; Alloys based on silver with copper as the next major constituent
Description
Current status; Patent provision filing date Jan. 14, 2008 application No. 61/010,954
The word “KARATIUM” is trademarked with US PTO (77396233) issue date Sep. 23, 2008.
BACKGROUND OF INVENTION
In the development of Karatium Pink, Yellow and White and studying the laws of the metals Act of 1906 I learned a great deal about the legalities of name use with gold and silver. While studying about sterling silver and understanding the great attributes of gold I thought why not replace some of the copper content in the sterling with fine gold knowing that gold polishes and casts well. There was no color difference noticeable to the eye. It seems that there can be a jewelry market niche for a “designer silver” much like 18 karat gold is considered designer gold and 14 karat more traditional. This “why not attitude” led to the invention of Karatium Sterling.
Claims
Thus having the invention that is claimed:1. A sterling silver metal alloy of 0.01-7.50% fine gold that has a white (silver) color and resist tarnishing and the discoloration of skin
2. Has all of the same jewelry workability as traditional sterling silver.
3. Consist of:
| Element | Mill alloy (%) | Casting alloy (%) | Patent range (%) |
| Au | 2.50 | 2.50 | 0.01-7.50 |
| Ag | 92.50 | 92.50 | 92.50-97.50 |
| Cu | 5.00 | 4.90 | 0.01-7.00 |
| Zn | No more than 5.00 | ||
| Si | No more than 1.00 | ||
| Ir | No more than 0.50 | ||
| Ge | 0.10 | No more than 1.00 | |
| B | No more than 0.10 | ||