Osmotic delivery device having a two-way valve and a dynamically self-adjusting flow channel
US7316680B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2005 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | Nov 18, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/0004
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An implantable osmotically driven delivery system having a dynamic, two-way valve and a self-adjusting, variable geometry fluid flow channel. As pressure within the agent delivery system increases, the fluid channel narrows, thereby restricting flow. At exceptionally high pressures, the valve can be designed to close altogether at the orifice or delivery end, or it can provide a minimal leak path so that a maximum fluid flow is never exceeded. At zero or very low pressures, the valve will close completely at the beneficial agent reservoir end, isolating the beneficial agent formulation from external fluid infiltration and thereby eliminating diffusion of external fluid into the beneficial agent formulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.