LOW TEMPERATURE IRREVERSIBLE THERMOCHROMIC COMPOSITIONS
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United States of America Patent
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Issued Date -
Jun 20, 2013
app pub date -
Feb 14, 2013
filing date -
May 7, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided herein are novel polythiophene compounds having polyalkoxyl sidechains and low temperature irreversible upon activation (IUA) thermochromic compounds/compositions thereof. The IUA thermochromic compounds or compositions are activated and exhibit an IUA color by heating to or above a reversible thermochromic transition temperature (RTTT) and cooling to or below an irreversible thermochromic transition temperature (IRTTT) in less than 2 seconds. The activated IUA thermochromic compounds or compositions will retain their IUA color as long as the compounds or compositions are kept at or below about 5° C. below the IRTTT. The activated IUA thermochromic compounds or compositions will be deactivated and show a different color upon exposure to a temperature equal to or higher than about 5° C. below the IRTTT unless the compounds or compositions are activated again. The IUA thermochromic compounds/composition can be used to prepare IUA thermochromic indicators which can monitor subjects stored below a pre-determined temperature and detect the subjects that have been exposed to a temperature above the pre-determined temperature.
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Patent Owner(s)
Patent Owner | Address | |
---|---|---|
BOARD OF GOVERNORS FOR HIGHER EDUCATION STATE OF RHODE ISLAND AND PROVIDENCE PLANTATIONS | KINGSTON RI |
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- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Euler, William B | Narragansett, US | 12 | 56 |
Lucht, Brett L | Kingston, US | 6 | 36 |
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11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 20, 2024 |
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