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Class Information
Number: 420/8
Name: Alloys or metallic compositions > Ferrous (i.e., iron base)
Description: Alloy or metallic composition containing over 50 percent of iron.










Sub-classes under this class:

Class Number Class Name Patents
420/120 1.5 percent or more manganese containing, but less than 8 percent 68
420/9 1.7 percent or more carbon containing 41
420/121 Boron containing 277
420/104 Chromium containing, but less than 9 percent 163
420/89 Copper containing 65
420/72 Eight percent or more manganese containing 35
420/77 Four percent or more aluminum containing 40
420/84 Lead, bismuth, selenium, tellurium or calcium containing 121
420/123 Molybdneum containing 51
420/119 Nickel containing, but 10 percent or less 93
420/34 Nine percent or more chromium containing 122
420/128 Nitrogen containinig 99
420/82 Noble metal containing 27
420/99 One percent or more carbon containing, but less than 1.7 percent 32
420/87 Over 0.05 percent sulfur, over 0.04 percent phosphorus or sulfur or phosphorus added in any amount to promote machinability 118
420/103 Over 0.1 percent aluminum containing, but less than 4 percent 87
420/94 Over 10 percent nickel containing 75
420/129 Processes 121
420/83 Rare earth metal containing 277
420/126 Titanium containing 111
420/122 Tungsten containing 36
420/117 Two percent or more silicon containing 134
420/127 Vanadium, tantalum or niobium containing 125
420/125 Zirconium containing 41


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8702835 High strength low alloyed sintered steel Apr. 22, 2014
8551396 Hydrogen storage material with intermediate bond strength and process for making the same Oct. 8, 2013
8349471 High-strength cold-rolled steel sheet excellent in workability and shape freezing property Jan. 8, 2013
8309178 Corrosion resistant coating for steel Nov. 13, 2012
8142574 Steel product for welding Mar. 27, 2012
8083990 Iron-based alloy having shape memory properties and superelasticity and its production method Dec. 27, 2011
8070894 Highly active liquid melts used to form coatings Dec. 6, 2011
8062584 Ferritic stainless steel sheet superior in heat resistance Nov. 22, 2011
8002908 Steel product with a high austenite grain coarsening temperature Aug. 23, 2011
7998230 Polymetal powder and sintered component produced based on this powder Aug. 16, 2011
7927433 Cold-rolled steel sheet Apr. 19, 2011
7842639 Mechanical alloying of a hydrogenation catalyst used for the remediation of contaminated compounds Nov. 30, 2010
7820099 Hot rolled steel sheet excellent in chemical convertibility and method of production of the same Oct. 26, 2010
7731808 Hot-rolled steel sheet and cold-rolled steel sheet and manufacturing method thereof Jun. 8, 2010
7501029 High-strength, high-permeability steel sheet for picture tube band and method of producing the same Mar. 10, 2009
7501030 Hot-rolled steel strip for high strength electric resistance welding pipe and manufacturing method thereof Mar. 10, 2009
7501031 Steel sheet for tin plated steel sheet and tin-free steel sheet each having excellent formability and manufacturing method thereof Mar. 10, 2009
7485196 Steel product with a high austenite grain coarsening temperature Feb. 3, 2009
7455736 High tensile strength steel sheet excellent in processibility and process for manufacturing the same Nov. 25, 2008
7381478 Hot rolled steel sheet for processing and method for manufacturing the same Jun. 3, 2008
7347969 Iron-based sintered compact and method for production thereof Mar. 25, 2008
7259124 Hydrogen storage composite and preparation thereof Aug. 21, 2007
7056599 Steel sheet for magnetic shields and manufacturing method thereof Jun. 6, 2006
6863968 Non-asbestos-based friction materials Mar. 8, 2005
6841123 Rust-resistant calcium steel Jan. 11, 2005
6822831 Magnetic thin film, magnetic thin film forming method, and recording head Nov. 23, 2004
6818155 Attaching components to a printed circuit card Nov. 16, 2004
6786982 Casting having an enhanced heat transfer, surface, and mold and pattern for forming same Sep. 7, 2004
6773829 Method for casting molten metal, apparatus for the same, and cast slab Aug. 10, 2004
6706419 Cold-rolled steel sheet or hot-rolled steel sheet excellent in painting bake hardenability and anti aging property at room temperature, and method of producing the same Mar. 16, 2004
6699335 Machine part Mar. 2, 2004
6695985 Electromagnetic wave suppressor sheet Feb. 24, 2004
6690759 Zirconium-base alloy and nuclear reactor component comprising the same Feb. 10, 2004
6635361 Magnetic shielding steel sheet and method for producing the same Oct. 21, 2003
6569220 Iron powder and method of producing such May. 27, 2003
6554918 High-strength hot-rolled steel sheet superior in stretch flange formability and method for production thereof Apr. 29, 2003
6527877 Iron-based alloy containing bonded and free carbon and method of manufacturing the same Mar. 4, 2003
6475305 Machine structural steel product Nov. 5, 2002
6383308 Torsion bar for seat belt retractor May. 7, 2002
6330836 Steel for gear drive plate gear and method for producing the drive plate gear Dec. 18, 2001
6258316 Steel ballistic shot and production method Jul. 10, 2001
6200395 Free-machining steels containing tin antimony and/or arsenic Mar. 13, 2001
6190516 High magnetic flux sputter targets with varied magnetic permeability in selected regions Feb. 20, 2001
6187261 Si(Ge)(-) Cu(-)V Universal alloy steel Feb. 13, 2001
6183606 Manufacture method of high coercivity FePt-Si3N4 granular composite thin films Feb. 6, 2001
6149862 Iron-silicon alloy and alloy product, exhibiting improved resistance to hydrogen embrittlement and method of making the same Nov. 21, 2000
6129791 Oxides dispersion steel and making process thereof Oct. 10, 2000
5876519 Fe-based amorphous alloy Mar. 2, 1999
5858125 Magnetoresistive materials Jan. 12, 1999
5690753 Steel containing super-finely dispersed oxide system inclusions Nov. 25, 1997

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