USPC Class Details

Description: 208 mineral oils: processes and products / 208 mineral oils: processes and products/(400) by treatment of solid mineral, e.g., coal liquefaction, etc. (428) including contact with extraneous additive other than hydrogen, e.g., solvent, etc. (434) additive is petroleum or fraction from petroleum refining

Hierarchy/Derived subclasses

208 / 400

-> 428

-> 434

uspto searches

Patent Apps in 208/434

Granted Patents in 208/434

Use the links above or do an advanced search in ppubs for:
(208/434.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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