USPC Class Details

Description: 208 mineral oils: processes and products / 208 mineral oils: processes and products/(46) chemical conversion of hydrocarbons (49) plural serial stages of chemical conversion (50) coking in at least one stage (53) first stage is coking

Hierarchy/Derived subclasses

208 / 46

-> 49

-> 50

-> 53

-> 54

-> 55

uspto searches

Patent Apps in 208/53

Granted Patents in 208/53

Use the links above or do an advanced search in ppubs for:
(208/53.ccls. or 208/54.ccls. or 208/55.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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