Dissolution controlled active agent dispenser
US4314557A · kind A · utility
180Cited by
11References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1980 |
| Grant date | Feb 9, 1982 |
| Priority date | — |
| Expiry date | May 19, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/7023
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Drug dispensers comprising a flat body composed of a drug solute phase dispersed in a continuous polymer matrix phase in which the release rate of drug from the body is substantially constant and is controlled by the rate at which the drug solute phase dissolves in the continuous polymer matrix phase. Such control and constancy are realized by establishing specific correlations between the diffusion coefficient, dissolution rate constant, and thickness of the body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.