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Class Information
Number: 420/37
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Nine percent or more chromium containing > Cobalt containing > Molybdenum or tungsten containing
Description: Alloy or metallic composition which additionally contains at least one of molybdenum or tungsten.










Sub-classes under this class:

Class Number Class Name Patents
420/39 Copper containing 14
420/38 Nickel containing 79


Patents under this class:

Patent Number Title Of Patent Date Issued
8034197 Ultra-high strength stainless steels Oct. 11, 2011
7820098 High Cr ferritic heat resistance steel Oct. 26, 2010
7785426 Welded joint of tempered martensite based heat-resistant steel Aug. 31, 2010
7484926 Steam turbine power plant Feb. 3, 2009
7297214 Free cutting alloy Nov. 20, 2007
7179318 Sliding member Feb. 20, 2007
6899772 Alloy molten composition suitable for molten magnesium environments May. 31, 2005
6881280 Iron-based alloy for internal combustion engine valve seat inserts and the like Apr. 19, 2005
6841122 Hot working die steel excelling in molten corrosion resistance and strength at elevated temperature and member for high temperature use formed of the hot working die steel Jan. 11, 2005
6746782 Diffusion barrier coatings, and related articles and processes Jun. 8, 2004
6696016 High-chromium containing ferrite based heat resistant steel Feb. 24, 2004
6485678 Wear-resistant iron base alloys Nov. 26, 2002
6479013 Casting components made from a tool steel Nov. 12, 2002
6419878 Fe-Cr alloy having excellent initial rust resistance, workability and weldability Jul. 16, 2002
6290904 Welding materials for high-Cr steels Sep. 18, 2001
6207103 Fe-Cr-Si steel sheets having excellent corrosion resistance and method for manufacturing the same Mar. 27, 2001
6174385 Ferritic heat resistant steels Jan. 16, 2001
6117388 Hot working die steel and member comprising the same for high-temperature use Sep. 12, 2000
5997806 Heat-resisting cast steel Dec. 7, 1999
5972287 Heat-resisting steel Oct. 26, 1999
5888318 Method of producing ferritic iron-base alloys and ferritic heat resistant steels Mar. 30, 1999
5591391 High chromium ferritic heat-resistant steel Jan. 7, 1997
5575972 FE-CR alloy and nozzle for diesel engines Nov. 19, 1996
5560788 Heat resisting steels Oct. 1, 1996
5358577 High strength and high toughness martensitic stainless steel and method of manufacturing the same Oct. 25, 1994
5340534 Corrosion resistant austenitic stainless steel with improved galling resistance Aug. 23, 1994
5338616 Far-infrared emitter of high emissivity and corrosion resistance and method for the preparation thereof Aug. 16, 1994
5064610 Heat resistant steel for use as material of engine valve Nov. 12, 1991
5000912 Nickel titanium martensitic steel for surgical needles Mar. 19, 1991
4948556 Piston ring material and piston ring Aug. 14, 1990
4822415 Thermal spray iron alloy powder containing molybdenum, copper and boron Apr. 18, 1989
4751046 Austenitic stainless steel with high cavitation erosion resistance Jun. 14, 1988
4626116 Head for wire dot printer Dec. 2, 1986
4540424 Heat-resisting alloy for rolls for glass forming Sep. 10, 1985
4482612 Low alloy or carbon steel roll with a built-up weld layer of an iron alloy containing carbon, chromium, molybdenum and cobalt Nov. 13, 1984
4263044 Iron/chromium/cobalt-base spinodal decomposition-type magnetic alloy Apr. 21, 1981
4236919 Magnetic alloy Dec. 2, 1980
4150978 High performance bearing steels Apr. 24, 1979
3990892 Wear resistant and heat resistant alloy steels Nov. 9, 1976











 
 
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