US PATENT SUBCLASS 202 / 135
.~.~.~.~.~ Plural gas and/or air admission

Current as of: June, 1999
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202 /   HD   DISTILLATION: APPARATUS

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
96  DF  .~.~ Thermolytic {5}
105  DF  .~.~.~ Retort {14}
133  DF  .~.~.~.~ Horizontal {6}
135.~.~.~.~.~ Plural gas and/or air admission

DEFINITION

Classification: 202/135

At least one of the fluids necessary for combustion in the heating chamber or flues is admitted at separate points in the path of the flame to lengthen the flame or to preserve a regulated temperature.

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108, and 109.