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COLOR MEMORY TOY

  • US 20030087580A1
  • Filed: 03/11/1994
  • Published: 05/08/2003
  • Est. Priority Date: 04/29/1987
  • Status: Abandoned Application
First Claim
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1. A color memory toy, comprising:

  • a toy body having an outer surface; and

    a quasi-reversible thermochromic coloring material applied to said surface and having a temperature hysteresis characteristic for changing between a first and second colored state, wherein said material changes from said first colored state to said second colored state completely at a upper temperature above a first temperature when said material is heated, maintains a present one of said first and second colored states within a two-color holding temperature range between said first temprature and a second temperature, and changes from said second colored state to said first colored state completely at a lower temperature below said second temperature when said material is cooled, wherein said two-color holding temperature range is within a range of ordinary temperature.

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