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Indicators for external variables consisting of singular and multiple depletion cells

  • US 10,338,537 B2
  • Filed: 09/02/2015
  • Issued: 07/02/2019
  • Est. Priority Date: 09/08/2014
  • Status: Active Grant
First Claim
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1. An electrochemical timing device comprising:

  • a. a lens for viewing a expiration of the timing device,b. a base,c. a cathode layer coupled to the lens and the base;

    d. an anode layer comprising a plurality of coated non-metalized sections and coupled to the lens and the base; and

    e. an electrolyte,wherein the timing device is activated when the electrolyte comes into contact with the anode layer and the cathode layer, and wherein the electrolyte is prevented from migrating past an edge of depletion by the coated non-metalized sections of the anode layer after the timing device is activated and wherein an RFID antenna is unshielded as the timing device expires, and wherein the electrolyte comprises an unconductive substance that becomes conductive when the electrolyte liquifies, and wherein the RFID antenna conveys additional data.

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