Process for making dispenser with cooperating elements
US4800056A · kind A · utility
20Cited by
13References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1986 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Feb 14, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M31/002
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method of forming a dispenser for delivering a beneficial agent to a biological environment. A beneficial agent and an expandable composition are placed in a capsule made of fluid dissolvable material. The capsule is closed and surrounded by a semipermeable wall which is permeable to fluid but not to the beneficial agent. Then a passageway is drilled in the capsule between the exterior and the interior which contains the beneficial agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.