Methods for fine particle formation
US5639441A · kind A · utility
185Cited by
31References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1994 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Apr 8, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Methods and apparatuses are provided for forming fine particles of a desired substance comprising dissolving said substance in a fluid such as water to form a solution and mixing the solution with a second fluid such as supercritical carbon dioxide which becomes a gas upon rapid pressure release, and with which the first fluid is at least partially immiscible, and releasing the pressure to form an air-borne dispersion or aerosol comprising particles having an average diameter between about 0.1 and about 6.5 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.