Biodegradable ionic matrix of variable internal polarity with grafted polymer
US6346263B1 · kind B1 · utility
4Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2000 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Mar 14, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5036
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a particulate biodegradable matrix comprising a biodegradable and hydrophilic core with a base of carbohydrate or polyol or polyamine matrix, cross-linked and derived in the mass by variable amounts of ionic groups; a hydrophilic polymer layer associated with the central core by chemical, for example ionic, interaction; and surface molecules or polymers grafted on the external polymer layer by covalent bonds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.