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Class Information
Number: 373/110
Name: Industrial electric heating furnaces > Resistance furnace device > With internal atmosphere control (e.g., pressure, vacuum, etc.)
Description: Subject matter wherein the environment within the furnace housing is regulated to have a specific pressure, a vacuum, or a specific medium.










Sub-classes under this class:

Class Number Class Name Patents
373/111 Having tubular charge containing or supporting element 54
373/112 Vacuum 41


Patents under this class:
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Patent Number Title Of Patent Date Issued
8134100 Heat processing furnace and method of manufacturing the same Mar. 13, 2012
8066814 Crystal-growing furnace having slurry drainage duct structure Nov. 29, 2011
7888622 Heat-processing furnace and manufacturing method thereof Feb. 15, 2011
7792177 Method and furnace for electrical calcination enabling utilization of volatile matters Sep. 7, 2010
7700898 Heat treatment equipment and method of driving the same Apr. 20, 2010
7604698 Cooling structure for body of crystal-growing furnace Oct. 20, 2009
7003985 Method and apparatus for removing polymeric coatings from optical fiber in a non-oxidizing environment Feb. 28, 2006
6895032 High-pressure processing apparatus May. 17, 2005
6834072 Method, furnace shell, and furnace for rebaking and graphitizing carbon bodies Dec. 21, 2004
6349108 High temperature vacuum furnace Feb. 19, 2002
6160836 Electro-smokeless extraction/recovery system Dec. 12, 2000
6111227 Furnace exhaust method and apparatus Aug. 29, 2000
5993202 Baking furnace and control method therefor Nov. 30, 1999
5987053 High temperature air cooled vacuum furnace Nov. 16, 1999
5898727 High-temperature high-pressure gas processing apparatus Apr. 27, 1999
5838716 Leak check procedure for a dry oxidation furnace tube Nov. 17, 1998
5708678 Method to equalize the temperature in a heating furnace with a controlled-oxidization ambient and heating furnace carrying out the method Jan. 13, 1998
5550858 Heat treat furnace with multi-bar high convective gas quench Aug. 27, 1996
5524020 Vacuum furnace with movable hot zone Jun. 4, 1996
5473628 Device for ring section furnace Dec. 5, 1995
5461214 High performance horizontal diffusion furnace system Oct. 24, 1995
5414927 Furnace elements made from graphite sheets May. 16, 1995
5299225 Graphitization furnace Mar. 29, 1994
5267257 Vacuum furnace with convection heating and cooling Nov. 30, 1993
5228052 Plasma ashing apparatus Jul. 13, 1993
5190901 Method for producing active carbon using carbon-containing material Mar. 2, 1993
5187771 Heat processing apparatus utilizing a plurality of stacked heater holders Feb. 16, 1993
5173921 Apparatus and process for activation of carbon by electrical resistance heating in the presence of steam Dec. 22, 1992
5173919 Manipulation of the exit gas flow in a melting furnace Dec. 22, 1992
5097114 Low-voltage heating device Mar. 17, 1992
4907245 Furnace with convection-free hot zone Mar. 6, 1990
4668287 Process for producing high purity zirconium and hafnium May. 26, 1987
4612651 Heat treating furnace with heating element hangers and radiation shield spacers Sep. 16, 1986
4523321 Vertical carbonizing furnace for use in the production of carbon fibers Jun. 11, 1985
4518846 Heater assembly for molecular beam epitaxy furnace May. 21, 1985
4510609 Furnace for vertical solidification of melt Apr. 9, 1985
4509179 Vacuum sintering and hot isostatic pressing in the same vessel Apr. 2, 1985
4503087 Process for high temperature drive-in diffusion of dopants into semiconductor wafers Mar. 5, 1985
4403769 Vacuum separator Sep. 13, 1983
4357210 Electric furnace for the calcination of carbonaceous materials Nov. 2, 1982
4336412 Heat treatment furnace Jun. 22, 1982
4212633 Vacuum electric furnace Jul. 15, 1980
4185157 Apparatus for collecting and removing smoke and fumes from a melting furnace plant Jan. 22, 1980
4158742 General purpose rocket furnace Jun. 19, 1979
4152111 Furnace for treatment of material at high temperature and pressure May. 1, 1979
4135053 Heating assembly for a heat treating furnace Jan. 16, 1979
4124199 Process and apparatus for case hardening of ferrous metal work pieces Nov. 7, 1978
4113977 Preheating system with gas recirculation Sep. 12, 1978
4103099 Electric furnaces Jul. 25, 1978
4024338 High temperature heat insulation May. 17, 1977

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