US PATENT SUBCLASS 392 / 311
.~ Fluid-in-circuit type heater

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

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
311.~ Fluid-in-circuit type heater {6}
312  DF  .~.~> Method
313  DF  .~.~> Portable
314  DF  .~.~> Continuous flow of fluid being heated {4}
322  DF  .~.~> With reservoir or tank {1}
324  DF  .~.~> Steam or vapor generator {2}
338  DF  .~.~> Electrode details

DEFINITION

Classification: 392/311

Fluid-in-circuit type heater:

(under subclass 200) Subject matter under Class 219, ... wherein the heating device includes an electrically conductive fluid, e.g., water, heated by passing an electric current directly through the conductive fluid between two or more spaced conductors in electrical contact with the fluid, whereby the conductive fluid itself acts as an electric resistance element.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

245+, for material subjected to electrical energy.

99, Foods and Beverages: Apparatus,

358, for electrode type and subclass 451 for electric, radiant or vibrational treating means.

201, Distillation: Processes, Thermolytic, 19, for applying electric energy directly to material.

210, Liquid Purification or Separation,

748, for utilizing electrical or wave energy directly applied to liquid.

219, Electric Heating,

600+, for inductive heating, note subclass 628 heat exchange by fluid or liquid; subclasses 678+ for microwave heating, note subclass 687 for a fluid heater; and subclasses 764+ for capacitive dielectric heating.

338, Electrical Resistors,

80+, for liquid resistance element.

373, Industrial Electric Heating Furnaces,

29+, for joule effect heating and subclasses 120+ for charge internal resistance heating.

426, Foods or Edible Material: Processes, Compositions, and Products,

234+, for passage of electric current through food material.