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Class Information
Number: 373/60
Name: Industrial electric heating furnaces > Arc furnace device
Description: Subject matter wherein the charge is heated by means of an electric arc produced between opposed electrodes (indirect arc furnaces) or between an electrode and the charge (direct arc furnaces).

Sub-classes under this class:

Class Number Class Name Patents
373/79 Charging or discharging 77
373/94 Electrode support 62
373/88 Electrode 64
373/85 For manipulation of the charge or melt (e.g., stirring) 45
373/71 Furnace body detail 64
373/61 Indirect 6
373/67 Ingot remelting 19
373/78 Plural furnace units 49
373/102 Power supply system 69

Patents under this class:

Patent Number Title Of Patent Date Issued
8651169 Arc melting furnace apparatus Feb. 18, 2014
8562713 Flexible minimum energy utilization electric arc furnace system and processes for making steel products Oct. 22, 2013
8240169 Vitreous silica crucible manufacturing apparatus Aug. 14, 2012
8217312 Method and device for heating a fluid Jul. 10, 2012
8110019 Modified induction furnace and process for removing zinc-containing metallurgical waste, with recovery of the metals therefrom Feb. 7, 2012
8021599 Method and installation for producing steel products with optimum surface quality Sep. 20, 2011
8023550 Reactance ballast device Sep. 20, 2011
7991039 Electric arc furnace monitoring system and method Aug. 2, 2011
6999495 Method and apparatus for spatial energy coverage Feb. 14, 2006
6810069 Electrical arc furnace protection system Oct. 26, 2004
6794598 Arc electrodes for synthesis of carbon nanostructures Sep. 21, 2004
6400748 Method for operating an electric arc furnace to build up and maintain foamed slag Jun. 4, 2002
6371711 Valveless continuous atmospherically isolated container feeding assembly Apr. 16, 2002
6289034 Process and an apparatus for producing metals and metal alloys Sep. 11, 2001
6229838 Electric arc furnace for the production of steel and method of operating this furnace May. 8, 2001
6154709 Method for determining the load capacity of an AC network Nov. 28, 2000
5788920 Oxygen blowing lance capable of being used in an electric furnace Aug. 4, 1998
5573573 Electric arc furnace arrangement for producing steel Nov. 12, 1996
5471495 Electric arc furnace arrangement for producing steel Nov. 28, 1995
5454852 Converter for the production of steel Oct. 3, 1995
5333146 On-site, biohazardous waste disposal system Jul. 26, 1994
5297160 Furnace electrode design Mar. 22, 1994
5255284 Anode for an electic arc furnace utilizing electrode segments Oct. 19, 1993
5252120 Method and apparatus for double vacuum production of steel Oct. 12, 1993
5245627 Use of a radiating arc furnace for treating a dross containing a metal in order to recover this metal Sep. 14, 1993
5237585 Direct-current arc furnace having circumferential zones of varying conductivity Aug. 17, 1993
5224118 On-site, biohazardous waste disposal system Jun. 29, 1993
5199043 Lining for a direct-current electric arc furnace Mar. 30, 1993
5189682 Method for increasing the efficiency of a direct current electric arc furnace Feb. 23, 1993
5166950 Process and apparatus for melting a furnace charge Nov. 24, 1992
5138629 Direct current electric arc furnace Aug. 11, 1992
5052018 Anode for a direct current arc furnace Sep. 24, 1991
4919191 Molten-metal forming method and apparatus which are bottom-loading, bottom-pouring and bottom-unloading Apr. 24, 1990
4870655 Apparatus for recovery of metallics and non-metallics from spent catalysts Sep. 26, 1989
4732369 Arc apparatus for producing ultrafine particles Mar. 22, 1988
4617673 Electric arc furnace having a space provided on one side of the furnace vessel for accommodating charging material Oct. 14, 1986
4604135 Apparatus and process for the metallurgical aftertreatment of premelted metals Aug. 5, 1986
4543124 Apparatus for continuous steelmaking Sep. 24, 1985
4509177 Electric arc-fired blast furnace system Apr. 2, 1985
4336411 Molten metal heating, stirring and casting apparatus Jun. 22, 1982
4015069 Apparatus for extracting metals from ore Mar. 29, 1977
3975184 Method and apparatus for production of high quality powders Aug. 17, 1976

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