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Class Information
Number: 373/112
Name: Industrial electric heating furnaces > Resistance furnace device > With internal atmosphere control (e.g., pressure, vacuum, etc.) > Vacuum
Description: Subject matter wherein the environment within the furnace housing is regulated to have a vacuum.

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
7531769 Carbon fiber composite muffle May. 12, 2009
6936792 Furnace cart and load transfer system for high temperature vacuum furnaces and process therefor Aug. 30, 2005
6914218 Vacuum oven, system incorporating the same and method of using the same Jul. 5, 2005
6283749 Inside/out, industrial vacuum furnace Sep. 4, 2001
6268590 Apparatus and method for continuous retorting of mercury from ores and others mercury contaminated materials Jul. 31, 2001
6252202 Furnace for heat treatment of dental materials Jun. 26, 2001
6093911 Vacuum heating furnace with tapered portion Jul. 25, 2000
6031207 Sintering kiln Feb. 29, 2000
5970213 Apparatus for heating a transparent substrate utilizing an incandescent lamp and a heating disk emitting infrared wavelengths Oct. 19, 1999
5883919 Diffusion furnace system for preventing gas leakage Mar. 16, 1999
5698158 Vacuum distillation apparatus for producing ultra high purity material Dec. 16, 1997
5416967 Method of forming a vacuum furnace having heat transfer arresting means May. 23, 1995
5389550 Organic substance analyzing method and apparatus using portable construction Feb. 14, 1995
5287383 Method and apparatus for producing active carbon using carbon-containing material Feb. 15, 1994
5193100 Apparatus for detecting gaseous discharge in vacuum furnaces Mar. 9, 1993
5119395 Interlock feed-through and insulator arrangement for plasma arc industrial heat treat furnaces Jun. 2, 1992
4860306 Hot zone employing graphite heating elements Aug. 22, 1989
4856022 Graphite hot zone assembly Aug. 8, 1989
4850575 Apparatus for manufacturing a sintered body with high density Jul. 25, 1989
4760584 Hearth support arrangement Jul. 26, 1988
4668287 Process for producing high purity zirconium and hafnium May. 26, 1987
4542513 Heater for hot isostatic pressing apparatus Sep. 17, 1985
4430055 Semi-continuous vacuum heat-treating furnace, and its operation process Feb. 7, 1984
4425660 Shielding arrangement for a vacuum furnace Jan. 10, 1984
4281985 Automatic thermocouple positioner for use in vacuum furnaces Aug. 4, 1981
4280807 Autoclave furnace with cooling system Jul. 28, 1981
4268708 Apparatus for vacuum sintering and hot isostatic pressing May. 19, 1981
4259538 Vacuum furnace arrangement having an improved heating element mounting means Mar. 31, 1981
4247734 Flexible thermocouple for vacuum electric furnaces Jan. 27, 1981
4246434 Work support for vacuum electric furnaces Jan. 20, 1981
4180697 Vacuum oven with graphite heating Dec. 25, 1979
4171126 Vacuum furnace with cooling means Oct. 16, 1979
4102637 Work support for vacuum electric furnaces Jul. 25, 1978
4020791 Apparatus for indiffusing dopants into semiconductor material May. 3, 1977
4008364 Apparatus for continuous refining of metals Feb. 15, 1977
3971679 Method of annealing oriented silicon steel Jul. 27, 1976
3939296 Annealing furnace base plate supports Feb. 17, 1976
3933434 High temperature chemical reactor Jan. 20, 1976

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