Process for producing capsules having a permeability-controllable membrane
US5089272A · kind A · utility
26Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1989 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Mar 29, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J13/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a process for producing a microcapsule comprising a permeability-controllable membrane. This process comprises adjusting the ionic strength of a solution of a soluble chitin derivative, and then bringing this solution into contact with a solution of a polyanionic polysaccharide, its salt or a mixture thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.