Signals and indicators – Indicators – Temperature responsive or compensating means
Reexamination Certificate
2006-06-21
2011-10-11
Smith, R. A (Department: 2841)
Signals and indicators
Indicators
Temperature responsive or compensating means
C116S200000, C374S052000
Reexamination Certificate
active
08033237
ABSTRACT:
The present invention utilizes the unique shape recovery properties of shape memory materials, especially shape memory polymers, to provide an inexpensive and easily identified method of determining when a product has been exposed to environmental conditions that would make it likely that the product has expired or is unfit for use. By allowing the shape memory material to alter its shape from a deformed shape to a memory shape in response to exposure to environmental conditions while attached to a visual indication device a viewer can easily determine if a product has expired.
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Everhart Joel J.
Havens David Ernest
Havens Teresa E.
Hood Patrick J.
Schneider Aaron M.
Cornerstone Research Group, Inc.
Courson Tania
Smith R. A
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