Signals and indicators – Indicators – Temperature responsive or compensating means
Reexamination Certificate
2007-05-17
2009-08-11
Smith, R. A. (Department: 2841)
Signals and indicators
Indicators
Temperature responsive or compensating means
C374S106000, C252S962000
Reexamination Certificate
active
07571695
ABSTRACT:
Freeze indicators providing a visual indication of exposure of the freeze indicator to a freezing or near-freezing temperature and their manufacture are disclosed. The freeze indicators employ colloidal dispersions as active elements and include flexible freeze indicators, freeze indicators protected against drying out and freeze indicators employing core shell composites, for example gold coated pigments as active indicator elements. Also disclosed are: a combination freeze indicator and threshold temperature indicator; a combination threshold indicator and cumulative temperature indicator; and three-way combination indicators that can provide indications of cumulative past temperature exposure, exposure to freezing temperatures and exposure to a temperature above a threshold.
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Baughman Ray H.
Prusik Thaddeus
Smith Dawn E.
Taylor Dene H.
K&L Gates LLP
Smith R. A.
Temptime Corporation
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