Osmotically driven fluid dispenser
US4320758A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1980 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Dec 8, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/14513
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved version of an osmotically driven mini-osmotic pump that is used to administer drug solutions. The basic components of the improved pump are: an inner flexible bag that holds the drug solution; a plug having a recessed inner end that seals the bag opening; a solution filling/discharge port through the plug; a cup-shaped, thermo-formed sleeve that fits partly about the bag and is made from a dispersion of an osmotically effective solute in a water soluble, theroplastic polymer vehicle; a shape-retaining, semipermeable membrane that encapulates the bag-sleeve subassembly; and a flow moderator that is received through the filling/discharge port in the plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.