US PATENT SUBCLASS 260 / DIG 20
.~.~ Antistatic agent contains pentavalent nitrogen

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260 /   HD   CHEMISTRY OF CARBON COMPOUNDS

DIG 15  DD  Antistatic agents not otherwise provided for {3}
DIG 19  DD  .~ Non-high polymeric antistatic agents/N {1}
DIG 20.~.~ Antistatic agent contains pentavalent nitrogen