US PATENT SUBCLASS 528 / 71
.~.~ Reactant contains at least one salt group, e.g., quaternary ammonium salt, etc.

Current as of: June, 1999
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528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
44  DF  .~ FROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC. {17}
71.~.~ Reactant contains at least one salt group, e.g., quaternary ammonium salt, etc.

DEFINITION

Classification: 528/71

(under subclass 44) Subject matter wherein at least one reactant contains a salt group.