US PATENT SUBCLASS 210 / 753
.~.~ Utilizing halogen or halogen containing material

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
749  DF  .~ Chemical treatment {8}
753.~.~ Utilizing halogen or halogen containing material {1}
754  DF  .~.~.~> Chlorine or bromine containing {2}

DEFINITION

Classification: 210/753

Utilizing halogen or halogen containing material:

(under subclass 749) Process wherein a material containing an element from group VII A, either free or as a compound, is added.

(1) Note. The halogen or halogen-containing material may be either the reactant or a catalyst. However, when it is a catalyst a reactant must be added.

SEE OR SEARCH CLASS

424, Drug, Bio-Affecting and Body Treating Compositions, especially

673+, for a process of fluoridating water to prevent dental caries.