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Timing system and device and method for making the same

  • US 8,077,553 B2
  • Filed: 07/08/2009
  • Issued: 12/13/2011
  • Est. Priority Date: 12/13/2002
  • Status: Expired due to Fees
First Claim
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1. A timing device comprising an electrochemical structure, the electrochemical structure comprising an electrolyte and electrodes in electrical communication with the electrolyte, wherein depletion of one or more of the electrodes provides an indication of a passage of a duration of time, further wherein the electrochemical structure is divided into isolated zones configured to change color at different rates to collectively provide a visual indication of the passage of the duration of time.

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  • 6 Assignments
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