US PATENT SUBCLASS 564 / 22
.~.~.~ Thiobiurets (i.e., HNH-C(=S)-NH-C(=X)-HNH, wherein X is S or O and substitution may be made for hydrogen only)

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}
17  DF  .~.~ Thioureas (i.e., HNH-C(=S)-HNH, wherein substitution may be made for hydrogen only) {7}
22.~.~.~ Thiobiurets (i.e., HNH-C(=S)-NH-C(=X)-HNH, wherein X is S or O and substitution may be made for hydrogen only)

DEFINITION

Classification: 564/22

(under subclass 17) Compounds which contain the grouping in the figure below, wherein X may be oxygen or sulfur, i.e., mono- or dithiobiurets. --

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