USPC Class Details – HistoricIP

Description: 987 organic compounds containing a bi, sb, as, or p atom or containing a metal atom of the 6th to 8th group of the periodic system / 987 organic compounds containing a bi, sb, as, or p atom or containing a metal atom of the 6th to 8th group of the periodic system/(30) phosphorus compounds (9/02; 9/06) (116) contains at least one (c)-p bond (9/28) (171) pentavalent p having the structure (c)2-p(=x) (x-c) where x is chalcogen (9/32)

Hierarchy/Derived subclasses

987 / 30	-> 116	-> c	-> 171	-> 172	-> x
				-> 173
				-> 174
				-> 175
				-> 176
				-> 177
				-> 178
				-> 179
				-> 180

uspto searches

Patent Apps in 987/171

Granted Patents in 987/171

Use the links above or do an advanced search in ppubs for:
(987/171.ccls. or 987/172.ccls. or 987/x.ccls. or 987/173.ccls. or 987/174.ccls. or 987/175.ccls. or 987/176.ccls. or 987/177.ccls. or 987/178.ccls. or 987/179.ccls. or 987/180.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.