US PATENT SUBCLASS 392 / 393
.~.~ By light bulb heat source

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}
393.~.~ By light bulb heat source

DEFINITION

Classification: 392/393

By light bulb heat source:

(under subclass 386) Subject matter wherein the substance is converted to the vapor state by the heat generated from an incandescent filament enclosed in a sealed, transparent envelope.

SEE OR SEARCH CLASS

219, Electric Heating,

220, for light means and subclass 552 for heating element structure.

313, Electric Lamp and Discharge Devices, appropriate subclasses for electric lamp.

338, Electrical Resistors,

234+, for gaseous or vacuum spacing between element and casing or housing. 362, Illumination,

101, for liquid container.