Time duration indicator systems, and also products...

Details Time duration indicator systems, and also products... Time duration indicator systems, and also products...

G - Physics

07

C

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G07C 1/02 (2006.01) G01K 3/04 (2006.01) G04F 1/02 (2006.01)

Patent

CA 1282285

A B S T R A C T Time duration indicator systems comprising a porous inert carrier ant 8 volatile liquid, capable of reversibly changing the visual properties of the carrier. Such indicator systems can be used for products having a limited duration of use or life. ****

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