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Class Information
Number: 420/29
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > 1.7 percent or more carbon containing > 2.7 percent or more carbon equivalent containing (i.e., cast iron) > Processes
Description: Processes of manufacturing an alloy or metallic composition .










Sub-classes under this class:

Class Number Class Name Patents
420/30 Adding rare earth or alkaline earth metal 35
420/33 Adding silicon 28
420/31 Adding sulfur, selenium or tellurium 9
420/32 Adding vanadium, titanium, niobium, or zirconium 10


Patents under this class:

Patent Number Title Of Patent Date Issued
8486329 Process for production of semisolidified slurry of iron-base alloy and process for production of cast iron castings by using a semisolidified slurry Jul. 16, 2013
8187529 Wear resistant alloy and method of producing thereof May. 29, 2012
7824605 As-cast carbidic ductile iron Nov. 2, 2010
6857962 Blind threaded fastener forming technique Feb. 22, 2005
6800146 Magnetic circuit member Oct. 5, 2004
6793707 Inoculation filter Sep. 21, 2004
6328783 Producing iron from solid iron carbide Dec. 11, 2001
6261339 Method for desiliconizing pig iron before refining it to steel Jul. 17, 2001
6210460 Strontium-aluminum intermetallic alloy granules Apr. 3, 2001
6197088 Producing liquid iron having a low sulfur content Mar. 6, 2001
6177045 Composition and method for inoculating low sulphur grey iron Jan. 23, 2001
5639420 Method of manufacturing compacted graphite cast iron Jun. 17, 1997
5634960 Scrap melting in a submerged arc furnace Jun. 3, 1997
5224985 Process and apparatus for the melting of metals in the cupola furnace operated without coke Jul. 6, 1993
4970051 Process for the introduction of nitrogen into cast iron Nov. 13, 1990
4889687 Nodular cast iron having a high impact strength and process of treating the same Dec. 26, 1989
4686081 Method for addition of low-melting point metal Aug. 11, 1987
4619696 Additive for metallurgical liquids, and method and device for the preparation thereof Oct. 28, 1986
4572818 Process for purifying metal compositions Feb. 25, 1986
4560409 Metal bearing graphitic carbons Dec. 24, 1985
4537629 Method for obtaining high purity ductile iron Aug. 27, 1985
4517019 Method for continuously treating molten metal May. 14, 1985
4517018 Cast iron alloy and method for producing same May. 14, 1985
4401469 Manufacturing cast iron with pre-reduced iron ore pellets Aug. 30, 1983
4298377 Vortex reactor and method for adding solids to molten metal therewith Nov. 3, 1981
4194901 Process for producing graphite agglomerates, and products obtained by it Mar. 25, 1980
4110108 Method of producing cast iron Aug. 29, 1978
4088974 Digital device for automatically checking carbon content in metal with reference to temperature stops on cooling curve May. 9, 1978
4008604 Determination of carbon analysis in irons Feb. 22, 1977
3975191 Method of producing cast iron Aug. 17, 1976
3942977 Process for making iron or steel utilizing lithium containing material as auxiliary slag formers Mar. 9, 1976











 
 
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