USPC Class Details

Description: 420 alloys or metallic compositions / 420 alloys or metallic compositions/(441) nickel base (457) copper containing (458) iron containing

Hierarchy/Derived subclasses

420 / 441-> 457-> 458

uspto searches

Patent Apps in 420/458

Granted Patents in 420/458

Advanced search in patft or appft for the hierarchy would be:

Press the Search button below to send the query to the USPTO site. (Granted patents search)

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.