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Inventor: Davitz; Daniel
Address: Glenview, IL
No. of patents: 7
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 7128871 |
Silver-colored alloy with low percentages of copper and zinc |
October 31, 2006 |
| 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 |
| 5882441 |
Silver colored alloy with low percentage copper |
March 16, 1999 |
| A silver colored alloy, highly tarnish resistant, corrosion resistant and brittleness free is provided. The alloy includes 90% to 94% by weight silver, 3.50% to 7.35% by weight zinc, 1% to 3% by weight copper, and 0.1% to 2.5% by weight silicon. The alloy is suitable for rings, earrings, |
| 5817195 |
Silver colored alloy with low percentage of nickel and copper |
October 6, 1998 |
| A silver colored alloy highly tarnish resistant, sterling silver is provided or having included therein: 90% to 92.5% by weight Silver; 5.75% to 7.5% by weight Zinc; 0.25% to less than 1% by weight Copper; 0.25% to 0.5% by weight Nickel; 0.1% to 0.25% by weight Silicon; and 0.0% to 0.5% |
| 5019335 |
Gold colored metal alloy |
May 28, 1991 |
| The present invention provides an improved casting alloy for use in costume jewelry and jewelry samples. In accordance with the present invention, a gold colored metal alloy is disclosed which is tarnish resistant and consists of the following ingredients such as, 75 to 85% copper, 5 to |
| 4948557 |
Tarnish resistant gold colored alloy with enhanced gold color |
August 14, 1990 |
| 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 |
| 4895701 |
Gold colored alloy composition with zero percent gold |
January 23, 1990 |
| A gold colored, tarnish and corrosion resistant gold free 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, and the balance is essentially silver. |
| 4865809 |
Copper-free gold alloy composition |
September 12, 1989 |
| A gold colored, tarnish and corrosion resistant copper free allow is disclosed usable for jewelry, dental purposes and the like. The alloy consists essentially of 8 to 20 percent Gold, 22 to 26 percent Indium, 22 to 28 percent Palladium, and the balance is essentially Silver. |
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