USPC Class Details

Description: 44 fuel and related compositions / 44 fuel and related compositions/(520) fuel product having passageway for gas (522) single element having aperture

Hierarchy/Derived subclasses

44 / 520-> 522

uspto searches

Patent Apps in 44/522

Granted Patents in 44/522

Use the links above or do an advanced search in ppubs for:
(44/522.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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