US PATENT SUBCLASS 196 / 132
.~ Automatic control
Current as of: June, 1999
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(under subclass 104) Mineral-oil vaporizers provided with means for automatically maintaining desired conditions, usually the temperature, constant within the vaporizer.
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141, for condensing apparatus with similar automatic means.
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122, Liquid Heaters and Vaporizers,
448.1, and 449.
165, Heat Exchange, 200+, for automatic control of a heat exchhanger of general utility.
201, Distillation: Processes, Thermolytic,
1, for a thermolytic distillation process combined with the positive step of determining some characteristic of the distilland, vapor, residue or condensate.
202, Distillation: Apparatus,
160, for a column having automatic temperature and/or pressure control.
203, Distillation: Proceesses, Separatory,
1, for a separatory distillation process including determining a characteristic or condition in the system.
236, Automatic Temperature and Humidity Regulation,