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 (232) silicon containing or process of making (240) with metal, metal oxide, or metal hydroxide (254) of group vi (i.e., cr, mo, w or po) (256) chromium (257) and group viii metal containing (i.e., iron or platinum group)

Hierarchy/Derived subclasses

502 / 100-> 232-> 240-> 254-> 256-> 257

uspto searches

Patent Apps in 502/257

Granted Patents in 502/257

Use the links above or do an advanced search in ppubs for:
(502/257.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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