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Toy that stably exhibits different colors with indicator for proper temperature application

  • US 5,085,607 A
  • Filed: 10/12/1990
  • Issued: 02/04/1992
  • Est. Priority Date: 10/14/1989
  • Status: Expired due to Term
First Claim
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1. A toy at least one section thereof bearing a color memory dye comprising an electron-supplying organic coloring compound, an electron accepting compound and an ester;

  • said color memory dye assuming a first color below t1 (°

    C.) and a second color above t2 (°

    C.), wherein t2>

    t1, 0≦

    t1, t2≦

    50°

    C. and 5≦

    t2-t1≦

    35, both of said first and second colors capable of being displayed between t1 and t2; and

    a temperature sensitive visual indicator, said temperature sensitive visual indicator being visible when at least one of said first and second colors is displayed and said temperature sensitive visual indicator operating to communicate written or pictoral information, said written or pictoral information conveying how to display the other of said first or second colors.

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