Rate controlling membranes for controlled drug delivery devices
US6375978B1 · kind B1 · utility
175Cited by
40References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1998 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Dec 17, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P29/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
This invention provides rate controlling membranes for controlled drug delivery devices that are stable over time and exhibit more predictable and consistent membrane functionality. According to another aspect, the membranes have enhanced permeability. According to the invention, the rate controlling membrane of a controlled drug delivery device is subjected to a pre-treatment annealing process wherein it is subjected to an elevated temperature for a predetermined time period and subsequently cooled to ambient conditions before incorporation into a controlled drug delivery device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.