Entrapment compositions and processes
Abstract
Abstract COMPOSITION WHICH COMPRISES THE STEPS OF: (A) PROVIDING AN AQUEOUS LATEX OF DISPERSED PARTICLES OF AT LEAST ONE PHYSIOLOGICALLY HARMLESS MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYMERS HAVING ACIDIC FUNCTIONALITY, POLYMES HAVING BASIC FUNCTIONALITY, AND POLYMERS HAVING BOTH ACIDIC AND BASIC FUNCTIONALITY, SAID SELECTED MEMBER BEING HYDRATABLE IN THE GASTRO-INTESTINAL TRACT, SAID POLYMER BEING A PRE-FORMED PRODUCT OF EMULSION POLYMERIZATION; (B) (PROVIDING A DISPERSION OF) INTERMIXING SAID LATEX AND A PHARMACEUTICALLY ACTIVE DRUG, SAID DRUG (BEING AT LEAST PARTIALLY SOLUBLE IN THE DISPERSING MEDIUM AND) HAVING FUNCTIONALITY REACTIVE WITH FUNCTIONALITY OF SAID POLYMER WITH THE PRIVISO THAT IF THE POLYMER CONTAINS ONLY ACIDIC GROUPS, THE DRUG MUST CONTAIN BASIC GROUPS AND IF THE POLYMER CONTAINS ONLY BASIC GROUPS, THE DRUG MUST CONTAIN ACIDIC GROUPS (, SAID DISPERSING MEDIUM BEING COMPATIBLE WITH SAID AQUEOUS LATEX; (C) INTERMIXING SAID LATEX AND SAID DRUG DISPERSION) TO EFFECT ABSORPTION OF SAID DRUG TO SAID POLYMER PARTICLES; ((D)) (C) SEPARATING THE PARTICULATE SORPTION PRODUCT OF STEP ((C)) AND ((E)) (D) FORMULATING SAID SORPTION PRODUCT INTO AN ORAL DOSE FORM.
Inventors
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Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |