US PATENT SUBCLASS 201 / 44
PLURAL DISTINCT TEMPERATURE STAGES


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

44PLURAL DISTINCT TEMPERATURE STAGES


DEFINITION

Classification: 201/44

Thermolytic processes as provided for in this class in which the carbonaceous material is subjected to at least two distinctly different temperature stages.

SEE OR SEARCH CLASS

202, Distillation: Apparatus,

150, 159 and 177+ for distillation apparatus including a

preheating device.

203, Distillation: Processes, Separatory,

71+, for plural separatory distillation steps.

208, Mineral Oils: Processes and Products,

49+, 354+ and 364+ for a process directed to heating mineral oil at distinct temperature stages.