Expulsion of material from a delivery device
US5897874A · kind A · utility
16Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1996 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Sep 20, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/4858
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A delivery device for delivering an active substance to a patient at a predetermined time after administration comprises a male hydrogel plug engaged in the neck of a female body. An expandable excipient such as a hydrogel powder or a pharmaceutical disintegrant in powder, slug or tablet form is provided beneath the active substance. In contact with an aqueous medium, the excipient absorbs water and swells such as to rapidly expel the active substance and effectively deliver it from the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.