pH-dependent sustained release, drug-delivery composition
US6465014B1 · kind B1 · utility
75Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Mar 21, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/205
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A pH-dependent sustained release, drug delivery composition capable of being formed into tablets or pellets, wherein the release is controlled by a diffusion barrier formed by the interaction of a pH-dependent gelling material and a pH-independent non-gelling material, comprising a polymer matrix comprising, by weight, (a) 10 to 50% sodium alginate, (b) 2 to 15% propylene glycol alginate and (c) 40 to 80% of a pharmaceutical medicament.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.