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Class Information
Number: 373/119
Name: Industrial electric heating furnaces > Resistance furnace device > With heating element detail > Wall contained
Description: Subject matter wherein the heating element is located within the wall of the furnace.

Patents under this class:

Patent Number Title Of Patent Date Issued
8487220 Vacuum oven Jul. 16, 2013
8134100 Heat processing furnace and method of manufacturing the same Mar. 13, 2012
7888622 Heat-processing furnace and manufacturing method thereof Feb. 15, 2011
7837969 Method of making large-volume CaF.sub.2 single crystals for optical elements with an optic axis parallel to the (100)-or (110)-crystal axis and CaF.sub.2 single crystal made thereby Nov. 23, 2010
7202448 Device for firing ceramic for dental prostheses Apr. 10, 2007
7145932 Electric furnace Dec. 5, 2006
6919539 Substantially-uniform-temperature annealing Jul. 19, 2005
6752624 Soaking apparatus Jun. 22, 2004
6723968 Conductive U-shaped jumper strap and method of use Apr. 20, 2004
6680023 Crucible for molten aluminum Jan. 20, 2004
6624390 Substantially-uniform-temperature annealing Sep. 23, 2003
6470041 Heater assembly and heated trough for molten aluminum Oct. 22, 2002
6433318 Electric heater assembly with in-line thermostat Aug. 13, 2002
6279352 Long hot zone furnace element and optical fiber drawing method practiced therewith Aug. 28, 2001
6125134 Electric furnace assembly Sep. 26, 2000
6049067 Heated crucible for molten aluminum Apr. 11, 2000
6031206 Tower furnace for the heat treatment of metal strips Feb. 29, 2000
5931665 Furnace for firing a glass-lined product Aug. 3, 1999
5869810 Impedance-heated furnace Feb. 9, 1999
5835525 Furnaces and linings having segments with surfaces configured to absorb and reradiate heat Nov. 10, 1998
5809056 Vitrification furnace with a gas light seal Sep. 15, 1998
5783802 Vertically lifted portable electric furnace and method for use thereof Jul. 21, 1998
5605645 Furnace heater surrounded by a ceramic tube and fastened with a ceramic flange Feb. 25, 1997
5550858 Heat treat furnace with multi-bar high convective gas quench Aug. 27, 1996
5539183 Vertically fitted portable electric furnace Jul. 23, 1996
5459748 Apparatus and method for electrically heating a refractory lined vessel by directly passing current througth an electrically conductive refractory via a resilient electrote assembly Oct. 17, 1995
5442158 Heating element support clip Aug. 15, 1995
5131005 Melting apparatus having double wall structure Jul. 14, 1992
5038361 Paint drying furnace Aug. 6, 1991
4550411 Sources used in molecular beam epitaxy Oct. 29, 1985
4504957 High temperature box annealing furnace Mar. 12, 1985
4435819 Electrical resistance furnaces Mar. 6, 1984
4423516 Dynamic gradient furnace with controlled heat dissipation Dec. 27, 1983
4337390 Electric heating element Jun. 29, 1982
4264778 Extraction furnace Apr. 28, 1981
4238635 Melting and casting means Dec. 9, 1980
4159415 Electric slot furnace Jun. 26, 1979
4147888 Electric heating element for electric resistance furnaces Apr. 3, 1979
4040795 Method for the conversion of crystalline silica raw materials into amorphous silica Aug. 9, 1977
4007325 Furnace assembly Feb. 8, 1977

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