US PATENT SUBCLASS 562 / 880
.~ Containing -C(=X)-NH-X-NH-C(=X)- or -C(=X)-X-NH-S(=O)(=O)-, wherein substitution may be made for hydrogen only, and the X's may be the same or diverse chalcogens

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {41}
880.~ Containing -C(=X)-NH-X-NH-C(=X)- or -C(=X)-X-NH-S(=O)(=O)-, wherein substitution may be made for hydrogen only, and the X's may be the same or diverse chalcogens

DEFINITION

Classification: 562/880

(under subclass 1) Compounds under Class 532, ... which contain either of the two following groups, in each of which substitution may be made only for hydrogen and the X's may be the same or diverse chalcogens (i.e., oxygen, sulfur, selenium or tellurium): [figure] [figure]

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588, Hazardous or Toxic Waste Destruction or Containment note

215, 222 for the destruction of organic hazardous or toxic waste containing chalcogen or nitrogen.