(under subclass 218) Apparatus wherein the means produces a combustible fluid from the solid fuel.
SEE OR SEARCH CLASS
48, Gas: Heating and Illuminating,
61+, for a gas producer, per se, in which the produced or liberated gas is not burned during its production, and subclass 113 for a gas generator of the furnace retort type.
60, Power Plants,
39.12, for a combustion products generator provided with means to produce a combustible gas which is subsequently delivered to and burned in the generator.
122, Liquid Heaters and Vaporizers,
5, for the combination of boiler structure intimately related with a gas producer.
