USPC Class Details

Description: 252 compositions / 252 compositions/(67) vaporization, or expansion, refrigeration or heat or energy exchange (68) with lubricants, or warning, stabilizing or anti-corrosion agents or persistent gases

Hierarchy/Derived subclasses

252 / 67

-> 68

uspto searches

Patent Apps in 252/68

Granted Patents in 252/68

Use the links above or do an advanced search in ppubs for:
(252/68.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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