Controlled-release dispenser
US4445641A · kind A · utility
50Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1982 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Jan 8, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S43/90
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dispenser for active ingredients is disclosed which provides zero-order rate of release of essentially all of the active ingredients. The dispenser comprises a rate-controlling membrane and a solid microporous polymeric reservoir having interconnected or continuous pores capable of retaining the active ingredient by capillary forces, the reservoir being such that the active ingredient is essentially insoluble therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.