US PATENT SUBCLASS 392 / 401
.~.~.~.~ With internal heating element

Current as of: June, 1999
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392 /   HD   ELECTRIC RESISTANCE HEATING DEVICES

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
386  DF  .~ Vaporizer {7}
394  DF  .~.~ Liquid evaporant (e.g., water, etc.) {6}
400  DF  .~.~.~ In-line connected closed tank (i.e., pressurized) {1}
401.~.~.~.~ With internal heating element

DEFINITION

Classification: 392/401

With internal heating element:

(under subclass 441) Subject matter wherein the closed tank

includes an electrical resistance heating element which is supported within the vessel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

451, for line connected tank.

497, for details of immersion heater.