US PATENT SUBCLASS 562 / 621
.~ Hydroxamic acids, chalcogen analogs or salts thereof (i.e., compounds having the -C(=X)-N(R)-XH group or the -C(XH)=NXR group, wherein R may be hydrogen or substitution for hydrogen, the X's in each group may be the same or diverse chalcogens, and H of -XH in each group may be replaced by a group IA or IIA light metal, or by substituted or unsubstituted ammonium)

Current as of: June, 1999
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562 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {41}
621.~ Hydroxamic acids, chalcogen analogs or salts thereof (i.e., compounds having the -C(=X)-N(R)-XH group or the -C(XH)=NXR group, wherein R may be hydrogen or substitution for hydrogen, the X's in each group may be the same or diverse chalcogens, and H of -XH in each group may be replaced by a group IA or IIA light metal, or by substituted or unsubstituted ammonium) {2}
622  DF  .~.~> Carbocyclic ring bonded directly to the carbon of the acid group
623  DF  .~.~> Nitrogen attached to the acid group directly or indirectly by acyclic nonionic bonding (e.g., N-hydroxy ureas, dihydroxamic acids, etc.)

DEFINITION

Classification: 562/621

(under subclass 1) Compounds under Class 532, ... which contain either of the following acid groups, in each of which the X's may be the same or diverse chalcogens (i.e., oxygen, sulfur, selenium or tellurium), the R's may be hydrogen or substitution for hydrogen, and H of -XH may be replaced by a Group IA or IIA light metal or by substituted or unsubstituted ammonium: [figure] [figure]

SEE OR SEARCH CLASS

588, Hazardous or Toxic Waste Destruction or Containment,

215, 225 for the destruction of organic hazardous or toxic waste containing chalcogen, nitrogen, and group IA or IIA light metals.