US PATENT SUBCLASS 424 / 724
.~ Silicon dioxide containing

Current as of: June, 1999
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424 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

600  DF  INORGANIC ACTIVE INGREDIENT CONTAINING {20}
724.~ Silicon dioxide containing

DEFINITION

Classification: 424/724

Silicon dioxide containing:

(under subclass 600) Compositions which contain silicon dioxide.

(1) Note. Typically the patents in this subclass are pre-1920 patents containing animal plant and mineral extracts. Silicon dioxide is typically the only identifiable inorganic constituents of the composition.

CROSS-REFERENCE ART COLLECTIONS

The following art collections are related to subclasses 130.1 through 283.1