US PATENT SUBCLASS 423 / 570
.~.~.~ Catalytic reaction

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

511  DF  SULFUR OR COMPOUND THEREOF {4}
567.1  DF  .~ Elemental sulfur {5}
569  DF  .~.~ Reducing sulfur dioxide by carbon containing material {1}
570.~.~.~ Catalytic reaction

DEFINITION

Classification: 423/570

(under subclass 569) Processes which include the step of employing a catalyst in the reduction reaction.