Coating compositions for solid medicines
US3957523A · kind A · utility
32Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1974 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Mar 28, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5047
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
When a mixture comprising 30 to 70% by weight of an enterosoluble cellulose derivative containing a monoester linkage with a polybasic acid, such as, hydroxypropyl methylcellulose phthalate, and 70 to 30% by weight of a digestive fluid-insoluble cellulose derivative, such as, ethylcellulose is used as a coating material for solid medicines, the rate of gradual release of active ingredients of the medicine in the intestinal tracts can be appropriately controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.