Mucous membrane-adhering film preparation and process for its preparation
US4517173A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1982 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | May 25, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2300/602
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A mucous membrane-adhering film preparation wherein the film consists of two layers. One layer of the film consists of the pharmaceutical agents and water-soluble high polymer material. The other layer of the film material consists of poor water-soluble agents. The pharmaceutical agent and water-soluble high polymer material layer first layer and the poor water-soluble agents second layer are separately prepared in solvents. The first solution is coated on a base plate having a favorable releasing nature, and, by removing the solvent, the film is produced on the base plate, the second solvent is then coated on the first layer and by removing the solvent, the desired film having one poor water-soluble surface is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.