Patent ID: 7388814
Filing Date: 2008-06-17
Classification: G04F

Abstract:
1. A time indicator for visually determining the passage of a predetermined period of time comprising: (a) a multi-layered base segment comprising a base impermeable support layer and a migrating ink or dye printed on the upper surface of said base impermeable support layer; (b) a multi-layered display segment adjacent to said base segment and containing a clear impermeable layer which is coated with a color print or opaque layer and which contains a viewing window area therein, through which progression of a migrating ink or dye can be monitored, wherein said viewing window is a non-coated area of said clear impermeable layer, said multi-layer display segment further comprising a non-curing ink or dye permeable polymer layer between said clear impermeable layer and said upper surface of said base impermeable support layer, and wherein said migrating ink or dye can migrate both vertically and horizontally from said printed ink or dye through said non-curing ink or dye permeable polymer layer; and (c) a removable impervious film between said multi-layer base segment and said multi-layer display segment, which prevents said migrating ink or dye from coming into contact with said non-curing ink or dye permeable polymer layer.