System for delivering an active substance for sustained release
US5160742A · kind A · utility
84Cited by
30References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1991 |
| Grant date | Nov 3, 1992 |
| Priority date | — |
| Expiry date | Dec 31, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5052
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A system for delivering an active substance has sustained release of the active substance in the intestinal tract. This delivery system is especially useful for an active substance such as a .beta.-lactam antibiotic which preferably has minimal exposure to the acidic environment of the stomach. Particles comprise an active ingredient disposed in a core which has at least one coating of a prolamine and one coating of an enteric compound thereon. The particles may be very small and suspended in a liquid medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.