Non-occulusive adhesive patch for applying medication to the skin
US5536263A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1994 |
| Grant date | Jul 16, 1996 |
| Priority date | — |
| Expiry date | Mar 30, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2013/00646
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A non-occlusive medication patch to be applied to the skin includes a porous self-supporting backing layer to give the patch the required integrity and strength by acting as a supporting framework for other components, and a flexible hydrophilic pressure-sensitive adhesive reservoir comprising a hydrocolloidal gel for the sustained release of medication to be absorbed topically through the skin into the body of a patient. The reservoir has two portions: first, an external coating layer with an exposed lower skin-contacting surface that forms a pressure-sensitive bond with the skin, and second, an upper internal portion which infiltrates the porous backing and becomes solidified therein after being applied so that the reservoir and the backing are unified, enabling the backing itself to act as a storage location for the medication-containing reservoir. The medication within the reservoir migrates over time from within the backing through the lower coating layer and passes through the skin to provide sustained release of the medication into the body of a patient. The reservoir comprises a hydrocolloidal dispersion of a natural or synthetic gel-forming polymer, a hydrophilic adhesive,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.