Control of process humidity to produce large, porous particles
US6848197B2 · kind B2 · utility
22Cited by
6References
13Claims
0Family size
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Key dates
| Filing date | Apr 18, 2001 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Aug 3, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/1694
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Spray dried particles having specified aerodynamic characteristics are produced by atomizing a liquid feed and contacting the liquid feed with a drying gas, such as, for example, air or nitrogen. The humidity of the drying gas is controlled to a value, expressed, for instance, as dew point, which is known to produce particles having a specified tap density or aerodynamic diameter. Particles having a volume median geometric diameter greater than about 5 microns and a tap density less than about 0.4 g/cm3 are preferred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.