US PATENT SUBCLASS 373 / 57
.~ Including resistance furnace detail

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


373 /   HD   INDUSTRIAL ELECTRIC HEATING FURNACES

56  DF  WITH CONDENSATING DEVICE {2}
57.~ Including resistance furnace detail {1}
58  DF  .~.~> With open circuit (i.e., charge internal resistance heating)

DEFINITION

Classification: 373/57

Including resistance furnace detail:

(under subclass 56) Subject matter including a furnace having a means to develop heat by the passage of current through a material, or device having the property of electrical resistance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3, and 5+, for resistance furnaces combined with other type furnaces.

109+, for resistance furnaces, per se.