USPC Class Details

Description: 502 catalyst, solid sorbent, or support therefor: product or process of making / 502 catalyst, solid sorbent, or support therefor: product or process of making/(20) regenerating or rehabilitating catalyst or sorbent (34) gas or vapor treating (53) elemental hydrogen

Hierarchy/Derived subclasses

502 / 20

-> 34

-> 53

uspto searches

Patent Apps in 502/53

Granted Patents in 502/53

Use the links above or do an advanced search in ppubs for:
(502/53.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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