Topical dressing
US5773022A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Aug 22, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2013/0296
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A topical dressing for dermal or transdermal administration of a substance, comprising a backing structure comprising a disc, a pad containing the active substance, a resilient layer with an adhesive provided on one side thereof, the resilient layer and the adhesive being provided with a cut-out defining a cavity in which the pad is placed, the disc of the backing structure being provided on the side of the resilient layer remote from the side provided with the adhesive and partly covering the resilient layer, and a covering structure having a release layer and a dish, the dish being formed to receive the pad during production and storage of the dressing, said covering structure being provided on the adhesive side of the resilient layer, whereby the backing structure is provided with one or more strips extending outwardly from the periphery edge of the backing disc towards the periphery edges of the resilient layer and in that the cover structure and the backing structure are sealed together within the cavity. There is also provided a method of producing a topical dressing according to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.