US PATENT SUBCLASS 502 / 164
.~.~.~ Quaternary ammonium or phosphonium

Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

100  DF  CATALYST OR PRECURSOR THEREFOR {12}
150  DF  .~ Organic compound containing {13}
162  DF  .~.~ Organic phosphorus or nitrogen, except the ammonium ion {5}
164.~.~.~ Quaternary ammonium or phosphonium

DEFINITION

Classification: 502/164

Quaternary ammonium or phosphonium:

(under subclass 162) Composition in which the nitrogen or phosphorus has four valence satisfied by organic moieties.