Effervescent microspheres and method for making them
US6210711A · kind A · utility
2Cited by
1References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Aug 13, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5073
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention concerns multilayer microspheres containing an acid substance, a basic substance, and a water-soluble isolating agent which, when it dissolves in water, after almost instant effervescence, brings about a homogeneous dispersion of active principal(s) which is present in the acid and basic substances. The invention also concerns a method for preparing such microspheres by rotational granulation on a fluid air bed associated with a system of tangential spraying of the wetting liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.