US PATENT SUBCLASS 203 / 35
.~.~.~ Phosphoric or sulfuric acid

Current as of: June, 1999
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203 /   HD   DISTILLATION: PROCESSES, SEPARATORY

28  DF  WITH CHEMICAL REACTION {1}
29  DF  .~ Including step of adding catalyst or reacting material {7}
34  DF  .~.~ Acid {1}
35.~.~.~ Phosphoric or sulfuric acid

DEFINITION

Classification: 203/35

(under subclass 34) Processes in which the acid is phosphoric or sulfuric.