Solvatochromic visual indicator and the use of the same

Details Solvatochromic visual indicator and the use of the same Solvatochromic visual indicator and the use of the same

2005-08-31

2010-11-09

Shewareged, Betelhem (Department: 1785)

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

C428S913000, C008S400000, C283S096000, C283S097000

Reexamination Certificate

active

07829181

ABSTRACT:
A graphic and/or message display system is described. The graphic and/or message display system functions to develop over a period of time a hidden graphic or message on an indicator panel or display area. The hidden graphic or message is revealed when an obscuring graphic reacts with a solvent to change color become at least substantially transparent. The graphic and/or message display system may be used as a stand-alone device or may be incorporated as part of various articles or products, for instance, as a positive reinforcement or a reminder to perform a task. Methods for using the graphic and/or message display system are also described.

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