US PATENT SUBCLASS 564 / 296
.~.~.~.~ Processes

Current as of: June, 1999
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564 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) {37}
281  DF  .~.~ Quaternary ammonium containing {2}
291  DF  .~.~.~ Acyclic {3}
296.~.~.~.~ Processes

DEFINITION

Classification: 564/296

(under subclass 291) Processes for the preparation, purification, separation, or recovery of quaternary ammonium compounds classifiable only in that subclass.