US PATENT SUBCLASS 392 / 387
.~.~ Method

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}
387.~.~ Method

DEFINITION

Classification: 392/387

Method:

(under subclass 386) Subject matter including processes for converting a substance from a solid or liquid to a gaseous state.

SEE OR SEARCH CLASS

134, Cleaning and Liquid Contact With Solids,

12+, for process by distilling, or liquefying vapors of, used agent.

165, Heat Exchange,

200+, for heat exchange process.

208, Mineral Oils: Processes and Products,

308+, for fractionation.

239, Fluid Sprinkling, Spraying, and Diffusing,

1+, for processes of distributing fluid material on or over an area or into the air.

431, Combustion,

13, for processes of heating or heater operation.

432, Heating,

13, for process of heating or heater operation.