US PATENT SUBCLASS 424 / 472
.~.~.~ Layered unitary dosage forms

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


424 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

400  DF  PREPARATIONS CHARACTERIZED BY SPECIAL PHYSICAL FORM {12}
464  DF  .~ Tablets, lozenges, or pills {5}
468  DF  .~.~ Sustained or differential release type {3}
472.~.~.~ Layered unitary dosage forms {1}
473  DF  .~.~.~.~> With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.)

DEFINITION

Classification: 424/472

Layered unitary dosage forms:

(under subclass 468) Subject matter in which the tablet contains at least one layer completely covering the core or is composed of multiple layers of differing release properties.