USPC Class Details

Description: 203 distillation: processes, separatory / 203 distillation: processes, separatory/(71) plural distillations performed on same material (73) one a distillation under positive pressure or vacuum (74) distillation of initial distillate (75) and return of distillation product to a previous distillation zone

Hierarchy/Derived subclasses

203 / 71

-> 73

-> 74

-> 75

uspto searches

Patent Apps in 203/75

Granted Patents in 203/75

Use the links above or do an advanced search in ppubs for:
(203/75.ccls.)

This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.

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