US PATENT SUBCLASS 424 / 484
.~ Matrices

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

400  DF  PREPARATIONS CHARACTERIZED BY SPECIAL PHYSICAL FORM {12}
484.~ Matrices {3}
485  DF  .~.~> Natural gums, resin or latex
486  DF  .~.~> Synthetic polymer {1}
488  DF  .~.~> Polysaccharides (e.g., cellulose, etc.)

DEFINITION

Classification: 424/484

Matrices:

(under subclass 400) Subject matter in which the special physical form includes a reticulated net work of material from which the drug is eluted or released by dissolution of the reticulated network physically holding the drug.

SEE OR SEARCH THIS CLASS, SUBCLASS:

469+, for a tablet containing discrete particles in a supporting matrix.

489+, for coated or impregnated particles carrying a drug.