Microencapsulation by phase separation of water-soluble medicaments
US4673595A · kind A · utility
7Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Oct 15, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2989
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The microencapsulation of medicamentous water-soluble substances is carried out by phase separation. The operations of the hardening step take place at a temperature comprised between about 0.degree. and about 25.degree. C., the non-solvent used during this step being an aliphatic fluorinated or fluorohalogenated hydrocarbon or a mixture of such hydrocarbons. Further, the non-solvent is used in an excess with respect to the volume of solvent and non-solvent resulting from the phase-separation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.