US PATENT SUBCLASS 203 / 34
.~.~ 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.~.~ Acid {1}
35  DF  .~.~.~> Phosphoric or sulfuric acid

DEFINITION

Classification: 203/34

(under subclass 29) Processes, in which the added material is an acid.

(1) Note. For purposes of this and indented subclasses the term "acid" includes inorganic compounds which contain hydrogen as the cation and under subclass 15 see (1) Note for definition of organic acids.

SEE OR SEARCH THIS CLASS, SUBCLASS:

33, for processes in which the reacting material is a complex inorganic acid salt, e.g., NaHCO3.