USPC Class Details – HistoricIP

Description: 44 fuel and related compositions / 44 fuel and related compositions/(300) liquid fuels (excluding fuels that are exclusively mixtures of liquid hydrocarbons) (304) organic compound of indeterminate structure which is a reaction product of an organic compound with sulfur halide or elemental sulfur containing

Hierarchy/Derived subclasses

44 / 300

-> 304

uspto searches

Patent Apps in 44/304

Granted Patents in 44/304

Use the links above or do an advanced search in ppubs for:
(44/304.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.