05446705 is referenced by 118 patents and cites 16 patents.

A time indicator is provided that changes color or produces an image or information after a specific time interval. The time indicator includes a base substrate with colored dye deposited on a first surface; and a substrate having an adhesive on a first surface thereof, the adhesive positioned at discrete locations on the first surface of the substrate. The substrate and the base substrate are put into adhesive contact. The adhesive contacts and coacts the colored dye to dissolve the dye and permit the dye to migrate through the adhesive to cause a color change visible through the substrate. The discrete adhesive inhibits lateral migration of the dye to preserve the image or information of the dye in a clear and/or understandable condition.

Title
Time indicator having discrete adhesive
Application Number
650221
Publication Number
5446705
Application Date
July 29, 1994
Publication Date
August 29, 1995
Inventor
Sandra F Haas
Suffern
NY, US
David J Haas
Suffern
NY, US
Agent
Weingram & Zall
Assignee
Temtec
NY, US
IPC
G09F 19/00
G04B 17/00
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