US PATENT SUBCLASS 201 / 37
.~ Combustion gases

Current as of: June, 1999
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201 /   HD   DISTILLATION: PROCESSES, THERMOLYTIC

36  DF  AND ADDING DISPARATE GASEOUS MATERIAL TO THE CARBONIZING ZONE {2}
37.~ Combustion gases

DEFINITION

Classification: 201/37

(under subclass 36) Processes in which the extraneous gaseous material includes combustion gases.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

443+, for a process of treating solid material with the products of combustion.

202, Distillation: Apparatus,

111, 121, 123, 130, 132, 140, 141+, 146, and 148 for a retort system heated by the heat carried off by the products of combustion.