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US 5,071,704 AGranted
Device for controlled release of vapors and scents
OwnerFariba Fischel-Ghodsianinventor
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Abstract
A controlled release device useful for the release of vapors or liquids is described. The device is a multilayered laminate consisting of a reservoir layer which incorporates an active compound, such as a perfume or fragrance or insect repellant, an impermeable membrane layer adjacent the reservoir layer and a diffusion rate limiting membrane layer adjacent the reservoir layer. The device preferably includes an adhesive layer for adhering the device to skin or a surface and an ornamental decorative layer.
Claims3
A device useful for the controlled release of a perfume or fragrance, said device forming a laminate comprising:
- a decorative layer consisting of an artistic design formed on a 50 um polyester film;
- a diffusion rate limiting membrane layer adjacent said decorative layer, said diffusion rate limiting membrane consisting of a 40 um thick ethylene vinyl-acetate film;
- a reservoir layer adjacent said diffusion rate limiting membrane layer, said reservoir layer comprising a gelled mixture of perfume and hydroxypropyl cellulose;
- a vapor and liquid impermeable backing layer adjacent said reservoir layer, said impermeable backing layer consisting of a 50 um thick medium density polyethylene/aluminized polyester/ethylene vinylacetate;
- a pressure sensitive contact adhesive layer adjacent said vapor and liquid impermeable backing layer, said adhesive layer consisting of a medical grade silicone adhesive.
2 more elements
Dependencies are inferred from the claim text.