US PATENT SUBCLASS 373 / 20
.~.~ Rotary furnace

Current as of: June, 1999
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373 /   HD   INDUSTRIAL ELECTRIC HEATING FURNACES

18  DF  PLASMA FURNACE DEVICE {3}
19  DF  .~ Indirect heating {1}
20.~.~ Rotary furnace

DEFINITION

Classification: 373/20

Rotary furnace:

(under subclass 19) Subject matter wherein the furnace is rotated, generally about its longitudinal axis.

SEE OR SEARCH CLASS

432, Heating,

103+, for tumbler- type rotary drum furnaces, per se.