Release rate modulator and method for producing and using same
US6109537A · kind A · utility
33Cited by
7References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1999 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Feb 18, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L9/042
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A release rate modulator for use with membrane-based formulations systems to control the release of a substance. The release rate modulator is formed from perforated polypropylene containing approximately 36 holes/cm.sup.2. Each hole is approximately 1 mm.sup.2 in size. The flow of substance passes through the holes and the membrane before reaching the surrounding environment. The use of the modulator improves the duration of substance release and provides a more constant release of the substance compared to unpredictable release rates obtained when the formulations systems did not contain the modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.