US PATENT SUBCLASS 564 / 37
.~.~.~.~ Acyclic

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}
32  DF  .~.~ Ureas (i.e., HNH-CO-HNH, wherein substitution may be made for hydrogen only) {9}
34  DF  .~.~.~ Carbazides or semicarbazides (i.e., HNH-NH-CO-HNH, wherein substitution may be made for hydrogen only) {3}
37.~.~.~.~ Acyclic

DEFINITION

Classification: 564/37

(under subclass 34) Compounds which do not contain any ring.

(1) Note. This subclass contains, for example: [figure] [figure]