Resources Contact Us Home
Browse by Category: Main > Electrical & Energy
Class Information
Number: 373/123
Name: Industrial electric heating furnaces > Resistance furnace device > With heating element detail > Open circuit (e.g., charge internal resistance heating) > With preheating
Description: Subject matter including means to preheat the principal heating means of the furnace to a temperature for rendering the heating means electrically conductive.

Sub-classes under this class:

Class Number Class Name Patents
373/124 Including starting resistor 2

Patents under this class:

Patent Number Title Of Patent Date Issued
5751759 Pre-heating furnace for baked amorphous carbon bodies May. 12, 1998
5265118 Silicon carbide whisker production apparatus Nov. 23, 1993
4635273 Method and apparatus for the thermal production of metal carbides and metals Jan. 6, 1987
4439145 Aluminum furnace and preheater therefor Mar. 27, 1984
4407666 Methods for prolonging the useful life of a graphite element in an optical fiber-drawing furnace Oct. 4, 1983

  Recently Added Patents
Synthesizing VHDL multiple wait FSMS into RT level FSMS by preprocessing
Memory interface circuit, memory interface method, and electronic device
Breathing mask
Optical writer and image forming apparatus including same
System and method for distributed security
Plants and seeds of corn variety CV294874
Dimmable LED light fixture having adjustable color temperature
  Randomly Featured Patents
Norbornene compounds with cross-linkable groups and their derivatives
Joint symbol, amplitude, and rate estimator
Branch circuit monitor
Method of crystallizing silicon layer
Closed vessel for radioactive substance, seal-welding method for closed vessel, and exhaust system used for seal-welding method
Image processing apparatus and image processing method for identifying a landing location on the moon or planets
Optimized startup verification of file system integrity
High efficiency low distortion amplification
Monobactam hydrazides containing catechol sulfonic acid groups
Compression ignition engine regulation system