Water insoluble derivatives of polyanionic polysaccharides
US6610669B1 · kind B1 · utility
38Cited by
13References
23Claims
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Key dates
| Filing date | Dec 22, 1999 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Dec 22, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2300/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A water insoluble, biocompatible gel is prepared by reacting carboxymethylcellulose and a carbodiimide, wherein the reaction is conducted in an aqueous medium containing a water miscible organic solvent, such as a lower alkanol, an alkyl pyrrolidone, DMSO or acetone. The present method permits the reaction to contain higher concentrations of carboxymethycellylose and less carbodiimide than conventional methods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.