USPC Class Details

Description: 521 synthetic resins or natural rubbers -- part of the class 520 series / 521 synthetic resins or natural rubbers -- part of the class 520 series/() synthetic resins (class 520, subclass 1) (50) cellular products or processes of preparing a cellular product, e.g., foams, pores, channels, etc. (78) preparing a cellular product by spraying a solid polymer containing material

Hierarchy/Derived subclasses

521 / 50-> 78

uspto searches

Patent Apps in 521/78

Granted Patents in 521/78

Use the links above or do an advanced search in ppubs for:
(521/78.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