Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Reexamination Certificate
2006-09-26
2006-09-26
Paik, Sang (Department: 3742)
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
C219S446100
Reexamination Certificate
active
07112766
ABSTRACT:
A hot-button type heat alert safety device attachable to a surface, such as metal or glass, for warning individuals that the surface is hot, comprising a thermochromic composition, a button-shaped container for housing the composition, having a convex face, the convex face overlying said composition and the container being transparent in at least a portion of the container overlying the thermochromic composition. The thermochromic composition is designed to undergo and maintain a readily perceptible color change whenever the temperature of the hot surface exceeds a predetermined temperature and reveal a heat warning symbol underneath the thermochromic composition which communicates that the surface is dangerously hot, the heat warning symbol being substantially visible through the convex face of the container.
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Horowitz Steven
Paik Sang
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