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Class Information
Number: 420/502
Name: Alloys or metallic compositions > Silver base > Copper containing
Description: Alloy, or metallic composition which additionally contains copper.

Sub-classes under this class:

Class Number Class Name Patents
420/503 Other noble metal containing 42
420/504 Zinc, or cadmium containing 42

Patents under this class:
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Patent Number Title Of Patent Date Issued
8668787 Silver alloy, sputtering target material thereof, and thin film thereof Mar. 11, 2014
8603366 Electrical contact material of silver matrix capable of resisting arc erosion and containing no cadmium-composite Dec. 10, 2013
8591805 Silver alloy having excellent contact resistance and antifouling property and suitable for use in probe pin Nov. 26, 2013
8501087 Au-base bulk solidifying amorphous alloys Aug. 6, 2013
8252127 Sputtering target material Aug. 28, 2012
7959855 White precious metal alloy Jun. 14, 2011
7556189 Lead-free bonding systems Jul. 7, 2009
7461772 Silver/aluminum/copper/titanium/nickel brazing alloys for brazing WC-Co to titanium alloys Dec. 9, 2008
7198683 Sterling silver alloy compositions of exceptional and reversible hardness, and enhanced tarnish resistance Apr. 3, 2007
7160632 Material for sliding contacts, clad composite material and small-sized DC motor using the same Jan. 9, 2007
7128871 Silver-colored alloy with low percentages of copper and zinc Oct. 31, 2006
6936117 Silver alloy with color fastness Aug. 30, 2005
6936218 Silver braze alloy Aug. 30, 2005
6913657 Hard precious metal alloy member and method of manufacturing same Jul. 5, 2005
6860949 High strength, tarnish resistant composition of matter Mar. 1, 2005
6726877 Silver alloy compositions Apr. 27, 2004
6620378 Precious metal solder Sep. 16, 2003
6596229 Silver braze alloy Jul. 22, 2003
6413649 Silver-copper-nickel infiltration brazing filler metal and composites made therefrom Jul. 2, 2002
6406664 Silver germanium alloy Jun. 18, 2002
6399019 Brazing material for use in joining a metal plate to a ceramic substrate Jun. 4, 2002
5972131 Ag-Cu alloy for a sliding contact Oct. 26, 1999
5955686 Brazing materials for producing metal-ceramics composite substrates Sep. 21, 1999
5922479 Brazing alloy and composite assembly joined by using the same Jul. 13, 1999
5916520 Brazing fillers for sealing vacuum-tight vessels, vacuum-tight vessels and method for manufacturing vacuum-tight vessels Jun. 29, 1999
5882441 Silver colored alloy with low percentage copper Mar. 16, 1999
5817195 Silver colored alloy with low percentage of nickel and copper Oct. 6, 1998
5593514 Amorphous metal alloys rich in noble metals prepared by rapid solidification processing Jan. 14, 1997
5558833 Silver alloy Sep. 24, 1996
5490870 Amalgamable composition and method of production Feb. 13, 1996
5425819 Magnetoresistive material Jun. 20, 1995
5352542 Use of silver alloys as cadium-free brazing solder Oct. 4, 1994
5341981 Use of a cadmium-free silver alloy as brazing solder (III) Aug. 30, 1994
5330098 Silver-copper-aluminum-titanium brazing alloy Jul. 19, 1994
5250229 Silver-rich conductor compositions for high thermal cycled and aged adhesion Oct. 5, 1993
5242511 Copper alloy compositions Sep. 7, 1993
5242305 Method and composition for removing mercury vapor from dental restorations Sep. 7, 1993
5198154 High temperature baking paste Mar. 30, 1993
5171643 Electric contact material and electric contact using said material Dec. 15, 1992
5021214 Ag alloy of high discoloration resistance Jun. 4, 1991
5000779 Palladium based powder-metal alloys and method for making same Mar. 19, 1991
4971759 Metallic material for flutes Nov. 20, 1990
4948557 Tarnish resistant gold colored alloy with enhanced gold color Aug. 14, 1990
4883745 Silver-copper-titanium brazing alloy containing crust inhibiting element Nov. 28, 1989
4869757 Silver alloys of exceptional and reversible hardness Sep. 26, 1989
4859412 Method of producing alloyed powders for dental amalgams Aug. 22, 1989
4842955 Homogeneous, metastable BAg-group brazing alloys Jun. 27, 1989
4810308 Silver alloys of exceptional and reversible hardness Mar. 7, 1989
4775511 Method of sulfide tarnish inhibiting of silver-copper, silver-gold and silver-copper-gold alloys Oct. 4, 1988
4766041 Ductile low temperature brazing alloy Aug. 23, 1988

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