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Warning device and method

  • US 20060256664A1
  • Filed: 08/20/2004
  • Published: 11/16/2006
  • Est. Priority Date: 08/21/2003
  • Status: Abandoned Application
First Claim
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1. A warning device for attachment to packaging of a product which has an expiration date, the device comprising:

  • timer means for counting passage of a pre-set period of time, according to a timing program tailored to the product, to the expiration date, and for providing a signal at the expiration date;

    an indicator arranged to receive said signal and to provide an indication to differentiate a pre-expiration date period from a post-expiration date period; and

    a switch coupled to the packaging and arranged to activate said indicator when a person attempts to use the product.

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