Controlled release tablet
US4816262A · kind A · utility
38Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1986 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Aug 28, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2072
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The disclosure herein describes a controlled release tablet which includes a core formed of a solid mixture having a hydrophilic releasable agent; the core has a central hole and is coated, on all faces except that bordering the hole with a hydrophobic material. The thickness of the core gradually increases from the hole to the outer border, this being a factor in the rate of release of the mixture through the hole. One application of such a tablet is for the controlled release of a therapeutic agent in the field of drug delivery systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.