USPC Class Details

Description: 420 alloys or metallic compositions / 420 alloys or metallic compositions/(8) ferrous (i.e., iron base) (9) 1.7 percent or more carbon containing (13) 2.7 percent or more carbon equivalent containing (i.e., cast iron) (18) processes of adding magnesium (25) in agent also containing silicon, rare earth, or alkaline earth metal

Hierarchy/Derived subclasses

420 / 8

-> 9

-> 13

-> 18

-> 25

uspto searches

Patent Apps in 420/25

Granted Patents in 420/25

Use the links above or do an advanced search in ppubs for:
(420/25.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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