Carbon dioxide sensitive material
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United States of America Patent
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-
Dec 15, 1998
Grant Date -
N/A
app pub date -
May 16, 1997
filing date -
Dec 19, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A carbon dioxide sensitive material including a polymer binder, a plasticiser, a lipophilic organic quaternary cation, an indicator dye anion and an aromatic alcohol in such concentration that the material changes color in accordance with the concentration of carbon dioxide.
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