USPC Class Details

Description: 44 fuel and related compositions / 44 fuel and related compositions/(300) liquid fuels (excluding fuels that are exclusively mixtures of liquid hydrocarbons) (329) heterocyclic carbon compound containing a hetero ring having chalcogen or nitrogen as the only ring hetero atoms (333) the hetero ring contains six members including nitrogen and carbon (335) plural nitrogens in the hetero ring (e.g., piperazines, etc.)

Hierarchy/Derived subclasses

44 / 300

-> 329

-> 333

-> 335

-> 336

uspto searches

Patent Apps in 44/335

Granted Patents in 44/335

Use the links above or do an advanced search in ppubs for:
(44/335.ccls. or 44/336.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.

Display:

Back