US PATENT SUBCLASS 203 / 36
.~.~ Alkaline oxide or hydroxide

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}
36.~.~ Alkaline oxide or hydroxide {1}
37  DF  .~.~.~> Alkali metal hydroxide

DEFINITION

Classification: 203/36

(under subclass 29) Processes, in which the added material is an alkaline oxide or an alkaline hydroxide.

(1) Note. This subclass is limited to the oxides and hydroxides of alkali metals, alkaline earth metals including magnesium and the scandium group metals.