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Class Information
Number: 420/22
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 of adding magnesium > Separate addition of plural agents, at least one containing magnesium
Description: Process wherein plural agents of different compositions are separately added to an alloy or metallic compositions under subclass 13, at least one of the agents containing magnesium.










Patents under this class:

Patent Number Title Of Patent Date Issued
8454764 Ni-25 heat-resistant nodular graphite cast iron for use in exhaust systems Jun. 4, 2013
6372180 Method of making mg treated iron with improved machinability Apr. 16, 2002
6372014 Magnesium injection agent for ferrous metal Apr. 16, 2002
6015448 Process for pig iron desulphurization Jan. 18, 2000
5205856 Inoculation wire Apr. 27, 1993
4889688 Process of producing nodular cast iron Dec. 26, 1989
4874576 Method of producing nodular cast iron Oct. 17, 1989
4601751 Process for the production of cast iron containing spherical graphite Jul. 22, 1986
4600434 Process for desulfurization of ferrous metal melts Jul. 15, 1986
4459154 Alloy and process for producing and casting ductile and compacted graphite cast irons Jul. 10, 1984
4409028 Process for producing cast iron Oct. 11, 1983
4396428 Processes for producing and casting ductile and compacted graphite cast irons Aug. 2, 1983
4292075 Slow fade inocculant and a process for the inocculation of melted cast iron Sep. 29, 1981
4246026 Manufacturing process of vermicular graphic cast-irons through double modification Jan. 20, 1981
4224064 Method for reducing iron carbide formation in cast nodular iron Sep. 23, 1980
4084962 After-treating alloy for making nodular iron Apr. 18, 1978
3984233 Ferrous metal network impregnated with rare earth metals Oct. 5, 1976
3965962 Process for producing ductile iron casting Jun. 29, 1976
3955973 Process of making nodular iron and after-treating alloy utilized therein May. 11, 1976











 
 
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