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Class Information
Number: 420/477
Name: Alloys or metallic compositions > Copper base > Zinc containing
Description: Alloy, or metallic composition which additionally contains zinc.










Sub-classes under this class:

Class Number Class Name Patents
420/478 Aluminum containing 45
420/482 Manganese containing 25
420/481 Nickel containing 52
420/483 Noble metal containing 16
420/484 Refractory metal containing 19


Patents under this class:
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Patent Number Title Of Patent Date Issued
8506730 Copper/zinc alloys having low levels of lead and good machinability Aug. 13, 2013
8465003 Plumbing fixture made of bismuth brass alloy Jun. 18, 2013
8425697 Tin-free lead-free free-cutting magnesium brass alloy Apr. 23, 2013
8349097 Dezincification-resistant copper alloy and method for producing product comprising the same Jan. 8, 2013
8273192 Lead-free, bismuth-free free-cutting phosphorous brass alloy Sep. 25, 2012
8273193 Lead-free, bismuth-free free-cutting silicon brass alloy Sep. 25, 2012
8211250 Method of processing a bismuth brass article Jul. 3, 2012
7910512 Production process of electrode catalyst for fuel cell Mar. 22, 2011
7736448 Nano icrystals copper material with super high strength and conductivity and method of preparing thereof Jun. 15, 2010
7628872 Lead-free free-cutting copper-antimony alloys Dec. 8, 2009
7354489 Lead-free copper alloy and a method of manufacture Apr. 8, 2008
7056396 Copper/zinc alloys having low levels of lead and good machinability Jun. 6, 2006
6799711 Minute copper balls and a method for their manufacture Oct. 5, 2004
6716541 Material for a metal strip Apr. 6, 2004
6632300 Copper alloy having improved stress relaxation resistance Oct. 14, 2003
6599378 Copper-based alloy, method for production of the alloy, and products using the alloy Jul. 29, 2003
6464810 Brass material, brass tube and their production method Oct. 15, 2002
6413651 Composite metal coil or plate and its manufacturing method Jul. 2, 2002
6413330 Lead-free free-cutting copper alloys Jul. 2, 2002
6391163 Method of enhancing hardness of sputter deposited copper films May. 21, 2002
6132528 Iron modified tin brass Oct. 17, 2000
6103188 High-conductivity copper microalloys obtained by conventional continuous or semi-continuous casting Aug. 15, 2000
6093499 Copper alloy foils Jul. 25, 2000
5997663 Nickel-free copper alloy Dec. 7, 1999
5961749 Use of a brass alloy for sanitary pipes Oct. 5, 1999
5908517 Alloy, in particular for use in the manufacture of frames for glass, jewelry, and the like Jun. 1, 1999
5885324 Method for the production of synthetic rutile Mar. 23, 1999
5839496 Composite material having anti-wear property and process for producing the same Nov. 24, 1998
5833920 Copper alloy for electronic parts, lead-frame, semiconductor device and connector Nov. 10, 1998
5766377 Copper-zinc-alloy for use in drinking-water installations Jun. 16, 1998
5658401 Copper-zinc alloy Aug. 19, 1997
5637132 Powder metallurgy compositions Jun. 10, 1997
5637160 Corrosion-resistant bismuth brass Jun. 10, 1997
5556446 Machinable brass compositions Sep. 17, 1996
5536293 Base metal composition for external electrode of multilayer electronic component Jul. 16, 1996
5445665 Machinable brass compositions Aug. 29, 1995
5441555 Powder metallurgy compositions Aug. 15, 1995
5429794 Alloys for brazing Jul. 4, 1995
5409552 Machinable copper alloys having reduced lead content Apr. 25, 1995
5344606 Fluid treatment alloy casting of Cu-Sn-Ni-Zn Sep. 6, 1994
5288458 Machinable copper alloys having reduced lead content Feb. 22, 1994
5286444 Copper bearing alloy Feb. 15, 1994
5282908 High strength .alpha. brass containing Mn, Si, Co, Fe, Sn and Pb Feb. 1, 1994
5262124 Alloy suited for use in water service and having improved machinability and forming properties Nov. 16, 1993
5137685 Machinable copper alloys having reduced lead content Aug. 11, 1992
5026433 Grain refinement of a copper base alloy Jun. 25, 1991
5004520 Method of manufacturing film carrier Apr. 2, 1991
4971758 Copper-based alloy connector for electrical devices Nov. 20, 1990
4935076 Copper alloy for use as material of heat exchanger Jun. 19, 1990
4886641 Electrical contact spring material made of copper base alloy of high strength and toughness with reduced anisotropy in characteristics Dec. 12, 1989

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