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Time tracking labeling system and method to make it

  • US 10,013,897 B1
  • Filed: 01/08/2017
  • Issued: 07/03/2018
  • Est. Priority Date: 01/08/2017
  • Status: Active Grant
First Claim
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1. A label for tracking the passing of time and communicating an expiration signal to a user comprising:

  • (a) a bottom layer;

    (b) a reactive layer;

    (c) a sacrificial layer; and

    (d) a top layer;

    where each of said bottom layer, said reactive layer, said sacrificial layer, and top layer is a rectangular prism;

    where said bottom layer, said reactive layer, said sacrificial layer, and top layer are assembled consecutively one over the other one in their horizontal orientation;

    (e) Oxygen impermeable protective layer.

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