US PATENT SUBCLASS 219 / 424
.~.~.~ With resistance heating element surrounding or embedded within walls of container

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
385  DF  .~ Combined with container, enclosure, or support for material to be heated {12}
420  DF  .~.~ Crucible or furnace type (i.e., adapted to hold meltable material) {6}
424.~.~.~ With resistance heating element surrounding or embedded within walls of container

DEFINITION

Classification: 219/424

(under subclass 420) Subject matter including resistance heating element means surrounding or permanently embedded within the walls of a crucible or furnace type container.

SEE OR SEARCH THIS CLASS, SUBCLASS:

406, for heating means combined with and surrounding an oven type container and subclass 407 for heating means embedded within or between the walls of an oven.

SEE OR SEARCH CLASS

373, Industrial Electric Heating Furnaces,

119, for resistance heater type furnaces with the resistance heater in the walls.