US PATENT SUBCLASS 564 / *
ORGANIC COMPOUNDS (Class 532, Subclass 1)


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564 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~> AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) {37}