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Class Information
Number: 420/77
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Four percent or more aluminum containing
Description: Alloy or metallic composition which additionally contains 4 percent or more aluminium.

Sub-classes under this class:

Class Number Class Name Patents
420/79 Chromium containing 52
420/80 Nickel or cobalt containing 24
420/78 Over 2 percent silicon containing 23
420/81 Zirconium, vanadium or titanium containing 27

Patents under this class:

Patent Number Title Of Patent Date Issued
8647450 Lightweight and excellent ductile bead wire, method for producing the same and lightweight tire Feb. 11, 2014
8202629 Cladding tubes made of ferritic/martensitic or austenitic steel for nuclear fuel elements/fuels and method for subsequently treating a FeCrA protective layer thereon that is suited for high te Jun. 19, 2012
7935883 Thermoelectric material and thermoelectric conversion module using the same May. 3, 2011
6830676 Coking and carburization resistant iron aluminides for hydrocarbon cracking Dec. 14, 2004
6830635 Spindle-shaped goethite particles, spindle-shaped hematite particles, spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same Dec. 14, 2004
6803693 Stator core containing iron-aluminum alloy laminations and method of using Oct. 12, 2004
6652991 Ductile NiAl intermetallic compositions Nov. 25, 2003
6475642 Oxidation-resistant coatings, and related articles and processes Nov. 5, 2002
6436339 Cast B2-phase iron-aluminum alloys with improved fluidity Aug. 20, 2002
6383662 Light weight steel and its use for car parts and facade linings May. 7, 2002
6277895 Skeletal iron catalyst having improved attrition resistance and product selectivity in slurry-phase synthesis processes Aug. 21, 2001
6265451 Skeletal iron catalyst and its preparation for Fischer-Tropsch synthesis processes Jul. 24, 2001
5670216 Cooking untensil, intermediate layer for non-stick coating of a cooking untensil, and method Sep. 23, 1997
5618491 Studs for boilers and other high temperature applications Apr. 8, 1997
5591535 Ferromagnetic metal powder Jan. 7, 1997
5534361 Ferromagnetic metal powder Jul. 9, 1996
5425821 Iron aluminum based engine intake valves and its manufacturing method Jun. 20, 1995
5330706 Vibration-damping alloy of high strength Jul. 19, 1994
5328527 Iron aluminum based engine intake valves and method of making thereof Jul. 12, 1994
5200145 Electrical steels and method for producing same Apr. 6, 1993
5173254 Steel having excellent vibration-dampening properties and weldability Dec. 22, 1992
5156922 Acicular magnetic iron based alloy particles for magnetic recording and method of producing the same Oct. 20, 1992
4988488 Iron aluminides and nickel aluminides as materials for chemical air separation Jan. 29, 1991
4961903 Iron aluminide alloys with improved properties for high temperature applications Oct. 9, 1990
4820485 Method of producing an iron-, cobalt- and nickel-base alloy having low contents of sulphur, oxygen and nitrogen Apr. 11, 1989
4769214 Ultrahigh carbon steels containing aluminum Sep. 6, 1988
4668310 Amorphous alloys May. 26, 1987
4668591 Magnetic separator matrix of cut pieces of an elongated crystalline magnetic alloy May. 26, 1987
4623387 Amorphous alloys containing iron group elements and zirconium and articles made of said alloys Nov. 18, 1986
4588438 Moulded object of alumina matter-containing raw material for aluminum smelting by blast furnace method May. 13, 1986
4415361 Iron based alloy Nov. 15, 1983
4405368 Iron-aluminum alloys containing boron which have been processed by rapid solidification process and method Sep. 20, 1983
4402745 New iron-aluminum-copper alloys which contain boron and have been processed by rapid solidification process and method Sep. 6, 1983
4398951 Fermalloy(Fe-Mn-Al stainless steel) Aug. 16, 1983
4334923 Oxidation resistant steel alloy Jun. 15, 1982
4299622 Magnetic alloy Nov. 10, 1981
4290799 Ferromagnetic metal pigment essentially consisting of iron and a process for its production Sep. 22, 1981
4286984 Compositions and methods of production of alloy for treatment of liquid metals Sep. 1, 1981
4093453 Method of making an ordered alloy Jun. 6, 1978
4018569 Metal of improved environmental resistance Apr. 19, 1977

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