US PATENT SUBCLASS 562 / 872
.~ Sulfonic anhydrides (i.e., compounds having the -S(=O)(=O)-O-S(=O)(O=) group

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {41}
872.~ Sulfonic anhydrides (i.e., compounds having the -S(=O)(=O)-O-S(=O)(O=) group

DEFINITION

Classification: 562/872

(under subclass 1) Compounds under Class 532, ... which contain the following group: [figure]

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588, Hazardous or Toxic Waste Destruction or Containment,

215, 222 for the destruction of organic hazardous or toxic waste containing oxygen or sulfur.