(under the class definition) Processes directed to carbonizing under pneumatic pressure or vacuum.
(1) Note. For purposes of this subclass the claims must clearly state that the pneumatic pressure in the carbonizing zone materially differs from ambient pressure.
(2) Note. Processes directed to carbonizing in which the charge is only subjected to container wall pressure are excluded.
SEE OR SEARCH CLASS
34, Drying and Gas or Vapor Contact With Solids,
402+, for a process of treating a solid under vacuum or applying gas or vapor under superatmospheric pressure.
202, Distillation: Apparatus, 110, for thermolytic distillation apparatus in which the distilland is under pressure.
203, Distillation: Processes, Separatory,
73+, and 91+ for a distillation process in which the distillation zone is under pressure or vacuum.
588, Hazardous or Toxic Waste Destruction or Containment, appropriate subclasses in which treating under pressure or a vacuum is used to destroy hazardous or toxic waste.
