US PATENT SUBCLASS 564 / 498
.~.~.~.~ Of an alkylene polyamine

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}
463  DF  .~.~ Acyclic {16}
497  DF  .~.~.~ Purification or recovery {2}
498.~.~.~.~ Of an alkylene polyamine

DEFINITION

Classification: 564/498

(under subclass 497) Processes wherein the compounds prepared are alkylene polyamines.