USPC Class Details – HistoricIP

Description: 505 superconductor technology: apparatus, material, process / 505 superconductor technology: apparatus, material, process/(825) apparatus, per se, device, per se, or process of making or operating same (917) mechanically manufacturing superconductor: (classes 29, 72, and 228) (918) with metallurgical heat treating (919) reactive formation of superconducting intermetallic compound

Hierarchy/Derived subclasses

505 / 825	-> 917	-> 918	-> 919	-> 920
				-> 921

uspto searches

Patent Apps in 505/919

Granted Patents in 505/919

Use the links above or do an advanced search in ppubs for:
(505/919.ccls. or 505/920.ccls. or 505/921.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.