Controlled release dosage form comprising different cellulose ethers
US4871548A · kind A · utility
101Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1987 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Apr 17, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/209
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dosage form is disclosed comprising a low number average molecular weight hydroxypropylmethylcellulose, a high number average molecular weight hydroxypropylmethylcellulose, and a beneficial drug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.