Powdered/microfibrillated cellulose
US6821531B2 · kind B2 · utility
7Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 5, 2001 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Dec 23, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B15/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A new cellulose excipient suitable for use as a binder, filler, and/or disintegrant in the development of solid dosage forms and as a bodying agent or a drug carrier in the preparation of topical formulations is described. The cellulose excipient is formed by soaking a source of cellulose in an aqueous alkali metal hydroxide solution. The cellulose is then regenerated, washed, and optionally hydrolyzed with a dilute mineral acid. The cellulose excipient is also useful as an aqueous dispersion in topical formulations and in the manufacture of cellulose beads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.