Preparation of microparticles having a selected release profile
US6379703B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Nov 28, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An improved method for preparing microparticles that exhibit controlled release of an effective amount of an active agent over an extended period of time. More particularly, a method is provided for preparing microparticles having a selected release profile for release of active agent contained in the microparticles. By adjusting the degree of drying that is performed during the preparation of the microparticles, the release profile can be controlled. By performing no intermediate drying, an initial burst and a substantially linear release profile is achieved. By performing substantially complete intermediate drying, an initial lag phase and a substantially sigmoidal release profile is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.