USPC Class Details

Description: 429 chemistry: electrical current producing apparatus, product, and process / 429 chemistry: electrical current producing apparatus, product, and process/(400) fuel cell, subcombination thereof, or method of making or operating (408) process or means for producing, recycling, or treating reactant, feedstock, product, or electrolyte (410) purification (411) hydrogen separator

Hierarchy/Derived subclasses

429 / 400-> 408-> 410-> 411

uspto searches

Patent Apps in 429/411

Granted Patents in 429/411

Use the links above or do an advanced search in ppubs for:
(429/411.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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