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| Number | Title | Issue Date |
| 7198683 | Sterling silver alloy compositions of exceptional and reversible hardness, and enhanced tarnish resistance A sterling silver alloy composition of exceptional and reversible hardness and enhanced tarnish resistance, consists essentially of the following parts by weight: at least about 92.5% silver; about 4.4% to about 5.25% copper; about 0% to about 1.0% zinc; about 0.85%... | 04/03/2007 |
| 7189292 | Self-encapsulated silver alloys for interconnects Alloys of silver and an alloying element that diffuses to the surface of the high conductivity metal and is oxidizable to form an alloying element oxide such as beryllium are provided along with electronic structures employing the alloys and methods of fabrication. | 03/13/2007 |
| 7160632 | Material for sliding contacts, clad composite material and small-sized DC motor using the same The invention provides a material for sliding contacts that is suitable for a small-sized DC motor used in recent downsized CD players and is excellent in durability. A material for sliding contacts used in a commutator of a small-sized DC motor that consists essent... | 01/09/2007 |
| 7153375 | Precious metal solder Platinum, silver and gold solder compositions for repairing, assembling, or sizing jewelry. Platinum compositions having about 90% to about 95% by weight platinum. Silver compositions having at least 92.5% by weight silver. Gold solder compositions having about 25% ... | 12/26/2006 |
| 7128871 | Silver-colored alloy with low percentages of copper and zinc 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 ter... | 10/31/2006 |
| 7118707 | Silver-platinum alloy and methods of manufacturing same A silver-platinum alloy formulated to provide improved tarnish resistance and hardness as compared to sterling silver. The alloy can be incorporated in various jewelry, flatware, and like articles. The alloy generally includes silver and platinum, with silver being ... | 10/10/2006 |
| 6936218 | Silver braze alloy The present invention relates to a silver braze alloy having improved wetting properties. The silver braze alloy consists essentially of from about 52.25 wt % to about 57.0 wt % silver, from about 38.95 to about 43.0 wt % copper, from about 0.5 wt % to about 5.5 wt ... | 08/30/2005 |
| 6936117 | Silver alloy with color fastness A silver alloy with color fastness includes silver as major component; and a small quantity of copper, zinc and nickel so that it can be prevented to oxidize, and it can use metal with easy procurement without special metal and manufacture a alloy with color fastnes... | 08/30/2005 |
| 6913657 | Hard precious metal alloy member and method of manufacturing same A hard precious metal alloy member is constituted of a gold alloy, which has a gold Au content of from 37.50 to 98.45 wt %, and contains a hardening additive in a range of not less than 50 ppm but less than 15,000 ppm, wherein the hardening additive is constituted o... | 07/05/2005 |
| 6860949 | High strength, tarnish resistant composition of matter A high strength, tarnish resistant composition of matter includes approximately 90 percent Ag, 3 to 5 percent Pt and 7 to 5 percent Cu. In a preferred embodiment, the composition of matter includes 90 percent Ag, 3 percent Pt and 7 percent Cu. In another preferred e... | 03/01/2005 |
| 6726877 | Silver alloy compositions Silver alloys having properties of fire scale resistance, reduced porosity and oxide formation and reduced grain size relative to traditional sterling silver alloys and useful work hardening performance are provided, comprising about 80-99.0% by weight silver, about... | 04/27/2004 |
| 6620378 | Precious metal solder Platinum, silver and gold solder compositions for repairing, assembling, or sizing jewelry. Platinum compositions having about 90% to about 95% by weight platinum. Silver compositions having at least 92.5% by weight silver. Gold solder compositions having... | 09/16/2003 |
| 6596229 | Silver braze alloy The present invention relates to a silver braze alloy having improved wetting properties. The silver braze alloy consists essentially of from about 52.25 wt % to about 57.0 wt % silver, from about 38.95 to about 43.0 wt % copper, from about 0.5 wt % to ab... | 07/22/2003 |
| 6413649 | Silver-copper-nickel infiltration brazing filler metal and composites made therefrom The present invention is directed to brazing filler metals that can be used in the infiltration brazing of porous matrix materials without the need for a flux. The brazing filler metals contain two different Group II metals and a third metal of Group 9 an... | 07/02/2002 |
| 6406664 | Silver germanium alloy A fire stain and tarnish resistance silver composition containing germanium, tin, and trace amounts of boron and nickel, as well as copper.... | 06/18/2002 |
| 6399019 | Brazing material for use in joining a metal plate to a ceramic substrate A metal-ceramic composite substitute is produced by joining a metal plate to a ceramic substrate by using a brazing material in a paste form prepared by adding 10-14 parts by weight of a vehicle to 100 parts by weight of a powder of which the solid centen... | 06/04/2002 |
| 5972131 | Ag-Cu alloy for a sliding contact An Ag--Cu alloy for a sliding contact containing: a) 0.1 to 8.0 wt. % of Cu, based on the weight of the alloy, wherein at least 70 wt. % of the Cu contained in the alloy is solid-solubilized in an Ag--phase; and b) 0.1 to 4.0 wt. %, based on the weight ... | 10/26/1999 |
| 5955686 | Brazing materials for producing metal-ceramics composite substrates A brazing material having 0.25-0.9 wt % of titanium oxide added to a basic formula consisting of 60-94.25 wt % Ag, 5-30 wt % Cu and 0.5-4.5 wt % of an active metal is processed to form a paste, which is applied to an AlN substrate and overlaid with a copp... | 09/21/1999 |
| 5922479 | Brazing alloy and composite assembly joined by using the same A brazing alloy for joining a pair of members at least one of which is a metallic member, contains Ag, Cu, In and Ti, and further contains from 0.03 wt. % to 1.2 wt. % Ni. A composite assembly of members at least one of which is a metallic member aid whic... | 07/13/1999 |
| 5916520 | Brazing fillers for sealing vacuum-tight vessels, vacuum-tight vessels and method for manufacturing vacuum-tight vessels The brazing filler of the present invention is excellent in wetting properties towards the open end of a ceramic cylinder and a metal sealing cap can be sealed well on the open end. The present brazing filler comprises Ag, Cu and active metal, in which th... | 06/29/1999 |
| 5882441 | Silver colored alloy with low percentage copper 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... | 03/16/1999 |
| 5817195 | Silver colored alloy with low percentage of nickel and copper 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 ... | 10/06/1998 |
| 5593514 | Amorphous metal alloys rich in noble metals prepared by rapid solidification processing Amorphous metal alloys rich in noble metals prepared by rapid solidification processing are disclosed. The alloys have at least a ternary composition having the formula Ma G1b G2c, wherein M is at least one element selecte... | 01/14/1997 |
| 5558833 | Silver alloy A silver alloy having a reduced porosity surface after it has been cast in a mold is disclosed. The silver alloy consists of silver in a range from 92.50 to 99.00 percent by weight, indium in a range from 0.01 to 7.40 percent by weight, molybdenum in a ra... | 09/24/1996 |
| 5490870 | Amalgamable composition and method of production A multi-component composition suitable for amalgamation with mercury to form a dental amalgam, an amalgam and a method for producing such a multi-component composition. The multi-component composition has: from 30 to 90% (by weight) of a first component c... | 02/13/1996 |
| 5425819 | Magnetoresistive material A granule-type magnetoresistive material is used to form a MR component, which is equipped in a magnetic head, or the like. When placing the magnetoresistive material in the external magnetic field, the electric resistance is altered responsive to a varia... | 06/20/1995 |
| 5352542 | Use of silver alloys as cadium-free brazing solder Cadmium-free brazing solders which also have working temperatures under 630° C. containing 45 to 80 wt. % silver, 5 to 25 wt. % copper, 10 to 25 wt. % gallium, and 0.1 to 5 wt. % indium and/or tin.... | 10/04/1994 |
| 5341981 | Use of a cadmium-free silver alloy as brazing solder (III) Cadmium-free brazing solders with working temperatures under 630° C. containing 45 to 80 wt. % silver, 5 to 13 wt. % copper, 10 to 25 wt. % gallium, 8 to 20 wt. % zinc, and 0 to 5 wt. % indium and/or tin.... | 08/30/1994 |
| 5330098 | Silver-copper-aluminum-titanium brazing alloy An alloy for brazing ceramics has the following composition, in weight percent: 0.5 to 3% titanium; 0.25 to 2% aluminum, silicon or tin; 2 to 6% copper; balance silver.... | 07/19/1994 |
| 5250229 | Silver-rich conductor compositions for high thermal cycled and aged adhesion The invention is directed to a thermal cycle adhesion additive composition consisting essentially of an admixture of finely divided particles of oxides of bismuth, copper, lead, zinc, and transition metal and to conductive thick film compositions made the... | 10/05/1993 |
| 5242511 | Copper alloy compositions A copper alloy composition comprising 100 parts by weight of powder of copper alloy represented by the general formula Agx Cuy (wherein x and y are atomic ratio values; 0.001ࣘ×ࣘ0.999, 0.001ࣘyࣘ0.999, x+y=1), 5 to 200 parts by... | 09/07/1993 |
| 5242305 | Method and composition for removing mercury vapor from dental restorations The amount of mercury released from amalgam restorations in the teeth of living beings is significantly reduced without changing the composition of the silver-tin-copper alloy or changing the mercury-alloy ratio. This is achieved by introducing a mercury-... | 09/07/1993 |
| 5198154 | High temperature baking paste A composition, which comprises copper alloy powder represented by a general formula Agx Cuy Mz (where M represents one or more metals selected from Pb, Bi and Zn; x, y and z are atomic ratio values, respectively; and 0.001... | 03/30/1993 |
| 5171643 | Electric contact material and electric contact using said material An electric contact material comprising 0.01 to 2.0 weight % of Li, 0.01 weight % or more to less than 0.2 weight % of at least one rare earth metal and the remainder being Ag. The electric contact material may further comprise 0.1 to 1.0 weight % of at l... | 12/15/1992 |
| 5021214 | Ag alloy of high discoloration resistance Ag allow generally used for decorative purposes such as silverware and accessories, including In and Al as a substitute for conventionally used Pd provides the products with high discoloration resistance and elegant tint inherent to Ag. Additional content... | 06/04/1991 |
| 5000779 | Palladium based powder-metal alloys and method for making same The subject of this invention is the development of new alloys along with new processing approaches for the utilization of the alloys. A particular class of alloys comprises at least one noble metal selected from the group comprising gold, palladium, silv... | 03/19/1991 |
| 4971759 | Metallic material for flutes In the composition of a Ag alloy type material used for production of flutes, a specified amount of at least one of Ni, Fe, Co and Cr or at least one of Mn, Ti, Zi and Si is added to suppress softening and crystal grain size coarsening caused by annealing... | 11/20/1990 |
| 4948557 | Tarnish resistant gold colored alloy with enhanced gold color 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 ... | 08/14/1990 |
| 4883745 | Silver-copper-titanium brazing alloy containing crust inhibiting element A silver-copper-titanium brazing alloy contains a small amount of tin, indium, silicon, aluminum or manganese as a crust inhibiting element.... | 11/28/1989 |
| 4869757 | Silver alloys of exceptional and reversible hardness A unique hardenable silver alloy is provided which is solution annealed and preferably age-hardened to yield a silver alloy of exceptional and reversible hardness. The alloys utilize intermetallic systems comprising; silver, copper, combined with lithium ... | 09/26/1989 |
