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US 2006/0130735 A1Published application
Temperature sensor
AssigneeBeech Tree Sensors LLC
InventorEsteban Papp
Life of this patent
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Abstract
The present invention provides a temperature sensor comprising a transparent capsule which contains an assembly within the transparent capsule wherein the assembly comprises a fracturable capsule containing an aqueous solution which opens upon freezing of the aqueous liquid; and a substrate proximate to the fracturable capsule which exhibits a color change upon contact with the aqueous liquid.
Claims12
A temperature sensor comprising a transparent capsule which contains an assembly within the transparent capsule wherein the assembly comprises:
- a) a fracturable capsule containing an aqueous liquid which opens upon freezing of the aqueous liquid;
- and
- b) a substrate proximate to the fracturable capsule which exhibits a color change upon contact with the aqueous liquid.
Dependencies are inferred from the claim text.