Process for conditioning substances
US5709884A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1995 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | Jan 30, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a process for providing a stable crystallinic form to a fine-grained substance or a substance mixture, which can be produced, stored and used while maintaining the aerodynamic properties required for inhalation of such a substance or a substance mixture, by PA1 a) in case of a substance mixture, preparing a homogenous mixture of the substances; PA1 b) micronizing, direct precipitating or diminishing by any conventional method the substance or substance mixture into a particle size required for inhalation, the particle size being less than 10 .mu.m; PA1 c) optionally preparing a homogenous mixture of the desired substances when each substance has been introduced from stage b) as separate fine-grained particles; PA1 d) conditioning said substance or substance mixture by treatment with a water containing vapor phase in a controlled fashion; and PA1 e) drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.