Pharmaceutical preparation to be administered orally with controlled release of active substance and method for its manufacture
US5472710A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Apr 29, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5078
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Pharmaceutical preparation to be administered orally with controlled release of active substance and method for its manufacture. Pharmaceutical preparation to be administered orally with controlled release of active substance, containing a nucleus which itself consists at least of one pharmacologically active substance, or a nucleus of physiologically safe material which is enveloped by an active substance layer, containing at least one pharmacologically active substance, if needed, a first membrane, then an acid layer consisting at least of a physiologically safe acid and then a compound membrane consisting of a pH sensitive polymer and an insoluble polymer, as well as methods for its manufacture. The pharmaceutical preparation is applicable to all claimed types of medicine and to the therapy of illnesses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.