End of use and time duration indicator system and method based on volatile dye
AssigneeS.C. Johnson & Son, Inc.
InventorsMurthy S. Munagavalasa, Stacey L. Forkner, Stanley J. Flashinski, Adam Hagop Buchaklian, David J. Houser
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Abstract
A time duration of end of product life indicator is disclosed which utilizes a volatile dye coated or impregnated into a substrate or carrier. The dye evaporates as a volatile component of the product evaporates thereby changing the color of the substrate or carrier. The consumer is alerted to the depletion of the volatile component of the product when the substrate or carrier changes from a colored or dyed state to an uncolored state. As a result, a visual time duration or end of product life indicator is provided.
Claims25
A time duration indicating system for a product that includes a volatile component, the system comprising:
- a substrate, and
- a volatile dye,
- the volatile dye being coated onto the substrate thereby coloring the substrate, the volatile dye evaporating over time resulting in a color change for the substrate.
A method for indicating an end of life of a product that includes a substrate coated with a volatile component, the method comprising:
- coating the substrate with a volatile dye thereby coloring the substrate, the volatile dye volatilizing over time resulting in a color change for the substrate.
An insecticide product with an end of life color change indicator, comprising:
- a substrate,
- a volatile insecticide coated onto the substrate, the volatile insecticide selected from the group consisting of transfluthrin, vapothrin, permethrin, prallethrin, tefluthrin and esbiothrin, and
- guaiazulene coated onto the substrate.
Dependencies are inferred from the claim text.