FREEZE INDICATORS SUITABLE FOR MASS PRODUCTION

  • US 20070119364A1
  • Filed: 11/06/2006
  • Published: 05/31/2007
  • Est. Priority Date: 11/07/2005
  • Status: Active Grant
First Claim
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1. A freeze indicator comprising:

  • (a) an indicator volume;

    (b) an indicator dispersion of solid particles dispersed in a liquid medium, the indicator dispersion being contained in the indicator volume and being capable of coagulating to provide an irreversible appearance change when subject to freezing; and

    (c) at least one vapor block member extending around the indicator volume to prevent loss of liquid vapor from the indicator dispersion.

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