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Class Information
Number: 420/90
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Copper containing > Chromium containing
Description: Alloy or metallic composition which additionally contains chromium.

Sub-classes under this class:

Class Number Class Name Patents
420/91 Nickel containing 59

Patents under this class:

Patent Number Title Of Patent Date Issued
8657969 High-strength galvanized steel sheet with excellent formability and method for manufacturing the same Feb. 25, 2014
8540934 Lead free free-cutting steel and its use Sep. 24, 2013
8465604 Ferritic stainless steel sheet having excellent corrosion resistance and method of manufacturing the same Jun. 18, 2013
8323560 Automobile high-strength electric resistance welded steel pipe with excellent low-temperature impact properties and method of manufacturing the same Dec. 4, 2012
8071017 Low cost high strength martensitic stainless steel Dec. 6, 2011
7922968 Corrosion resistance improved steel sheet for automotive muffler and method of producing the steel sheet Apr. 12, 2011
7914629 High strength thick steel plate superior in crack arrestability Mar. 29, 2011
7910512 Production process of electrode catalyst for fuel cell Mar. 22, 2011
7604860 High tensile nonmagnetic stainless steel wire for overhead electric conductor, low loss overhead electric conductor using the wire, and method of manufacturing the wire and overhead electric c Oct. 20, 2009
6454881 Non-refined steel being reduced in anisotropy of material and excellent in strength, toughness and machinability Sep. 24, 2002
6426038 Universal alloy steel Jul. 30, 2002
6290904 Welding materials for high-Cr steels Sep. 18, 2001
6287395 High-energy weldable soft magnetic steel and its use for parts of magnetic suspension railways Sep. 11, 2001
6277895 Skeletal iron catalyst having improved attrition resistance and product selectivity in slurry-phase synthesis processes Aug. 21, 2001
6271642 Advanced battery controller with state of charge control Aug. 7, 2001
6265451 Skeletal iron catalyst and its preparation for Fischer-Tropsch synthesis processes Jul. 24, 2001
6193930 Brazing alloy Feb. 27, 2001
6187261 Si(Ge)(-) Cu(-)V Universal alloy steel Feb. 13, 2001
6165289 Water-resistant long-life rolling bearing Dec. 26, 2000
5951944 Lowly decarburizable spring steel Sep. 14, 1999
5817275 Steel plate having excellent corrosion resistance and sulfide stress cracking resistance Oct. 6, 1998
5743972 Heavy-wall structural steel and method Apr. 28, 1998
5445686 Fe-Cu alloy sheet having an alloy structure of high uniformity Aug. 29, 1995
5252148 Soft magnetic alloy, method for making, magnetic core, magnetic shield and compressed powder core using the same Oct. 12, 1993
5192497 Superalloys with low thermal-expansion coefficient Mar. 9, 1993
5049210 Oil Country Tubular Goods or a line pipe formed of a high-strength martensitic stainless steel Sep. 17, 1991
5045279 Corrosion-resistant carbon steel with good drawability characteristics Sep. 3, 1991
5013525 Steel for corrosion-resistant rolling part and rolling part May. 7, 1991
4869758 Iron/copper/chromium alloy material for high-strength lead frame or pin grid array Sep. 26, 1989
4650645 Heat-resisting steels Mar. 17, 1987
4360381 Ferritic stainless steel having good corrosion resistance Nov. 23, 1982
4350525 Magnetic suspension railroad parts Sep. 21, 1982
4348229 Enamelling steel sheet Sep. 7, 1982
4266974 Alloy steel powder having excellent compressibility, moldability and heat-treatment property May. 12, 1981
4261768 Low alloyed steel having improved corrosion behavior, in particular relative to sea water Apr. 14, 1981
4253874 Alloys steel powders Mar. 3, 1981
4210445 Niobium-containing weldable structural steel having good weldability Jul. 1, 1980
4094670 Weathering steel with high toughness Jun. 13, 1978
3954421 Alloys for high creep applications May. 4, 1976

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