US PATENT SUBCLASS 62 / 912
External refrigeration system

Current as of: June, 1999
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62 /   HD   REFRIGERATION

912External refrigeration system {1}
913  DF  .~> Liquified gas

DEFINITION

Classification: 62/912

External refrigeration system:

Subject matter with specific details of systems to provide refrigeration to the distillation column which are separate therefrom.