US PATENT SUBCLASS 424 / 687
.~.~.~ Calcium carbonate

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}
682  DF  .~ Aluminum, calcium or magnesium element, or compound containing {7}
686  DF  .~.~ Carbonate or bicarbonate {1}
687.~.~.~ Calcium carbonate

DEFINITION

Classification: 424/687

Calcium carbonate:

(under subclass 686) Compositions which contain calcium carbonate.

(1) Note. Synonyms/Examples. Precipitated chalk.