Sustained-release percutaneous preparations
US4889721A · kind A · utility
7Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Jul 15, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y5/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Sustained-release percutaneous preparations which have at least two adhesive layers and in which a drug is contained in the layer farthest from the skin and a solid powder is dispersed in an adhesive layer other than the layer farthest from the skin provide slow release of the drug. By varying the kind and concentration of the solid powder, the rate of release of the drug from the preparations can be controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.