Patent ID: 7943063
Filing Date: 2011-05-17
Classification: G01K

Abstract:
1. A method for producing a thermal indicator material comprising: providing a plurality of compounds having the following structure: wherein: R n is between 1 and 1000; m is between 0 and 1000; l is between 1 and 1000; and the compounds having a first low temperature color; heating the compounds to a temperature of or above a pre-determined temperature to form heated compounds; cooling the heated compounds to a temperature within a range of between about 20° C. and 50° C. below the pre-determined temperature in a time period of less than 2.0 seconds to form cooled compounds, the cooled compounds exhibiting a second low temperature color and exhibiting a color change from the second low temperature color to the first low temperature color when the compounds are exposed to a temperature that meets or exceeds the pre-determined temperature and then cooled to a temperature within the range of between about 5 to 20° C. below the pre-determined temperature in a time period of greater than 2.0 seconds.