USPC Class Details

Description: 501 compositions: ceramic / 501 compositions: ceramic/(1) ceramic compositions (134) titanate, zirconate, stannate, niobate, or tantalate or oxide of titanium, zirconium, tin, niobium, or tantalum containing (e.g., dielectrics, etc.) (135) alkaline earth or magnesium containing

Hierarchy/Derived subclasses

501 / 1	-> 134	-> 135	-> 136	-> 137	-> 138
					-> 139

uspto searches

Patent Apps in 501/135

Granted Patents in 501/135

Use the links above or do an advanced search in ppubs for:
(501/135.ccls. or 501/136.ccls. or 501/137.ccls. or 501/138.ccls. or 501/139.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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