US PATENT SUBCLASS 260 / DIG 17
.~ High polymeric (resinous) antistatic agents

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260 /   HD   CHEMISTRY OF CARBON COMPOUNDS

DIG 15  DD  Antistatic agents not otherwise provided for {3}
DIG 17.~ High polymeric (resinous) antistatic agents {1}
DIG 18  DD  .~.~> High polymeric (resinous) antistatic agents containing pentavalent nitrogen