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/(100) catalyst or precursor therefor (216) sulfur or compound containing same (219) and group vi metal containing (i.e., cr, mo, w or po)

Hierarchy/Derived subclasses

502 / 100	-> 216	-> 219	-> 220
			-> 221

uspto searches

Patent Apps in 502/219

Granted Patents in 502/219

Use the links above or do an advanced search in ppubs for:
(502/219.ccls. or 502/220.ccls. or 502/221.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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