USPC Class Details – HistoricIP

Description: 75 specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures / 75 specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures/(330) processes (392) producing or treating free metal (414) at 300 degrees c or greater (e.g., pyrometallurgy, etc.) (433) iron(fe) (438) making wrought iron(fe)

Hierarchy/Derived subclasses

75 / 330	-> 392	-> 414	-> 433	-> fe	-> 438	-> 439
						-> 440
						-> 441	-> 442

uspto searches

Patent Apps in 75/438

Granted Patents in 75/438

Use the links above or do an advanced search in ppubs for:
(75/438.ccls. or 75/439.ccls. or 75/440.ccls. or 75/441.ccls. or 75/442.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.