Extended, controlled-release pharmaceutical compositions using charged polymers
US8425892B2 · kind B2 · utility
3Cited by
55References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2003 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Jun 23, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K47/38
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a delivery system for pharmaceutical compositions relying in part on an ionic interaction to control and facilitate release of the treating agent. More specifically, the invention relates to an extended controlled-release system having an ionic treating agent and an ionic polymer, wherein the polymer is sufficiently ionized to release the treating agent in a controlled manner over an extended period of time and the composition does not require an emulsion system for administering the treating agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.