US PATENT SUBCLASS 564 / 439
.~.~.~.~ Of compound having amino nitrogen and hydroxy bonded directly to the benzene ring (H of -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal)

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}
305  DF  .~.~ Benzene ring containing {24}
437  DF  .~.~.~ Purification or recovery {2}
439.~.~.~.~ Of compound having amino nitrogen and hydroxy bonded directly to the benzene ring (H of -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal)

DEFINITION

Classification: 564/439

(under subclass 437) Processes for the purification, separation or recovery of compounds having an amino group and a hydroxyl bonded directly to the benzene ring, wherein the H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal (i.e., aminophenols).