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Class Information
Number: 420/60
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Nine percent or more chromium containing > Copper containing
Description: Alloy on metallic composition which additionally contains copper.










Sub-classes under this class:

Class Number Class Name Patents
420/61 Molybdenum or tungsten containing 85


Patents under this class:
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Patent Number Title Of Patent Date Issued
8663403 High corrosion resistance precipitation hardened martensitic stainless steel Mar. 4, 2014
8657971 Brake disk excellent in temper softening resistance and toughness Feb. 25, 2014
8608873 Stainless steel, cold strip produced from this steel, and method for producing a flat steel product from this steel Dec. 17, 2013
8540933 Stainless austenitic low Ni steel alloy Sep. 24, 2013
8528513 Cast steel piston for internal combustion engines Sep. 10, 2013
8491735 Steel sheet for vitreous enameling and method for producing the same Jul. 23, 2013
8470237 Stainless steel excellent in corrosion resistance, ferritic stainless steel excellent in resistance to crevice corrosion and formability, and ferritic stainless steel excellent in resistance t Jun. 25, 2013
8444916 Stainless steel excellent in corrosion resistance, ferritic stainless steel excellent in resistance to crevice corrosion and formability, and ferritic stainless steel excellent in resistance t May. 21, 2013
8357247 Martensitic stainless steel for disk brakes Jan. 22, 2013
8163233 Martensitic stainless steel for welded structures Apr. 24, 2012
8152937 Ferritic stainless steel sheet having superior sulfuric acid corrosion resistance and method for manufacturing the same Apr. 10, 2012
8153055 Ferritic stainless steel with excellent heat resistance Apr. 10, 2012
8071017 Low cost high strength martensitic stainless steel Dec. 6, 2011
8017070 Direct to metal sintering of 17-4PH steel Sep. 13, 2011
7985306 High corrosion resistance precipitation hardened martensitic stainless steel Jul. 26, 2011
7985372 Ferritic stainless steel sheet for use in raw material pipe for forming bellows pipe Jul. 26, 2011
7943085 Ferritic stainless steel for automobile exhaust gas passage components and welded steel pipe May. 17, 2011
7922837 Steel sheet for vitreous enameling and method for producing the same Apr. 12, 2011
7883663 Low chromium stainless steel superior in corrosion resistance of multipass welded heat affected zones and its method of production Feb. 8, 2011
7431812 Surface oxidised nickel-iron metal anodes for aluminium production Oct. 7, 2008
7070663 Ferritic and martensitic stainless steels excellent in machinability Jul. 4, 2006
6824672 Use of austenitic stainless steels in applications requiring anti-coking properties Nov. 30, 2004
6756011 High-strength, high corrosion-resistant and non-magnetic stainless steel Jun. 29, 2004
6689312 Alloy composition and improvements in mold components used in the production of glass containers Feb. 10, 2004
6576186 Enhanced machinability precipitation-hardenable stainless steel for critical applications Jun. 10, 2003
6464802 High Cr steel pipe for line pipe Oct. 15, 2002
6440579 Process for producing a drawn wire made of stainless steel, in particular a wire for reinforcing tires, and wire obtained by the process Aug. 27, 2002
6426040 Si(Ge)-Cu-V steel alloy Jul. 30, 2002
6426038 Universal alloy steel Jul. 30, 2002
6274084 Corrosion-resistant low-nickel austenitic stainless steel Aug. 14, 2001
6245289 Stainless steel alloy for pulp refiner plate Jun. 12, 2001
6096441 Austenoferritic stainless steel having a very low nickel content and a high tensile elongation Aug. 1, 2000
6056917 Austenitic stainless steel having a very low nickel content May. 2, 2000
6033497 Pitting resistant duplex stainless steel alloy with improved machinability and method of making thereof Mar. 7, 2000
5858128 High chromium martensitic steel pipe having excellent pitting resistance and method of manufacturing Jan. 12, 1999
5824265 Stainless steel alloy for pulp refiner plate Oct. 20, 1998
5672215 Duplex stainless steel excellent in corrosion resistance Sep. 30, 1997
5630983 Precipitation hardening stainless steels May. 20, 1997
5626817 Austenitic heat resistant steel excellent in elevated temperature strength May. 6, 1997
5591392 Steel plate having good corrosion resistance to condensed water Jan. 7, 1997
5462611 Ferritic stainless steel excellent in high temperature oxidation resistance and scale adhesion Oct. 31, 1995
5362337 Free-machining martensitic stainless steel Nov. 8, 1994
5254836 Method of arc welding with a ferrite stainless steel welding rod Oct. 19, 1993
5252148 Soft magnetic alloy, method for making, magnetic core, magnetic shield and compressed powder core using the same Oct. 12, 1993
5089067 Martensitic stainless steel Feb. 18, 1992
5064610 Heat resistant steel for use as material of engine valve Nov. 12, 1991
4911883 Cold working stainless steel Mar. 27, 1990
4880481 Punch and counter punch plates Nov. 14, 1989
4869758 Iron/copper/chromium alloy material for high-strength lead frame or pin grid array Sep. 26, 1989
4849166 High strength stainless steel Jul. 18, 1989

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