USPC Class Details – HistoricIP

Description: 436 chemistry: analytical and immunological testing / 436 chemistry: analytical and immunological testing/(2) process or composition for determination of physical state or property by means including a chemical reaction (4) of crystal or crystalline material

Hierarchy/Derived subclasses

436 / 2

-> 4

uspto searches

Patent Apps in 436/4

Granted Patents in 436/4

Use the links above or do an advanced search in ppubs for:
(436/4.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.