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Class Information
Number: 373/1
Name: Industrial electric heating furnaces > Plural diverse heating means
Description: Subject matter including plural, different in kind, or type heating elements.

Sub-classes under this class:

Class Number Class Name Patents
373/2 Arc 43
373/7 Induction 16
373/5 Resistance 16

Patents under this class:

Patent Number Title Of Patent Date Issued
8391331 Method of charging fine-grained metals into an electric-arc furnace Mar. 5, 2013
7227882 System and method of processing electric arc furnace dust Jun. 5, 2007
6800110 System for producing noble metals Oct. 5, 2004
6723968 Conductive U-shaped jumper strap and method of use Apr. 20, 2004
6477195 Process for melting sponge iron and electric-arc furnace for carrying out the process Nov. 5, 2002
6400747 Quadrilateral assembly for coherent jet lancing and post combustion in an electric arc furnace Jun. 4, 2002
5946340 Process for melting of metal materials in a shaft furnace Aug. 31, 1999
5107517 Melting furnace Apr. 21, 1992
4940486 Process for treating liquid metals Jul. 10, 1990
4935607 Control unit and method of making the same Jun. 19, 1990
4782215 Control unit and method of making the same Nov. 1, 1988
4448802 Method and apparatus for evaporating material under vacuum using both an arc discharge and electron beam May. 15, 1984
4425092 System for burning fine-grained material, particularly for the manufacture of cement clinkers Jan. 10, 1984
4407651 Hybrid reheating system and method for polymer preforms Oct. 4, 1983
4392822 System for burning fine-grained material, particularly for the manufacture of cement clinkers Jul. 12, 1983
4093816 Furnace heating apparatus Jun. 6, 1978
4013401 Apparatus for preheating a raw material charge for application to an electric furnace Mar. 22, 1977
3995100 Arrangement for the production of ingots from high-melting metals, particularly steel, by electroslag remelting Nov. 30, 1976

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