US PATENT SUBCLASS 123 / 558
.~.~.~ Fuel is heated to ignition temperature

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

434  DF  CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29}
543  DF  .~ Heating of combustible mixture {13}
557  DF  .~.~ Fuel only {1}
558.~.~.~ Fuel is heated to ignition temperature

DEFINITION

Classification: 123/558

Fuel is heated to ignition temperature:

(under subclass 557) Subject matter in which the heating means heats the fuel to the temperature at which it will spontaneously ignite when exposed to air at ambient temperature.