Perfume patch
US4880690A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Sep 9, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/40
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A perfume patch comprising a fragrance-emitting member having a fragrance dispersed within an ultra-thin polyurethane membrane. A layer of pressure sensitive adhesive is applied to adhere the member to a surface. The polyurethane is formed from a diisocyanate, a macroglycol, and an acrylyl chain terminator to which a photoinitiator and a fragrance oil are added prior to curing. A barrier layer may be applied by an adhesive or other suitable means to prevent migration of the fragrance oil to the adhesive so that no residue of adhesive remains on the surface. The perfume patch preferably includes a support for the fragrance-emitting member for ease in application and handling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.