US PATENT SUBCLASS 562 / 887
.~ Carboxylic acid anhydrides (i.e., compounds having the -C(=O)-O-C(=O)- group)

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}
887.~ Carboxylic acid anhydrides (i.e., compounds having the -C(=O)-O-C(=O)- group) {2}
888  DF  .~.~> Processes of forming the -C(=O)-O-C(=O)- group {7}
898  DF  .~.~> Purification or recovery

DEFINITION

Classification: 562/887

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

SEE OR SEARCH CLASS

588, Hazardous or Toxic Waste Destruction or Containment,

215, 219 for the destruction of organic hazardous or toxic waste containing oxygen.