Patent ID: 7833438
Filing Date: 2010-11-16
Classification: C08G,C08L,C09D,G01N

Abstract:
1. A method of determining the genuineness of an article which comprises: providing a composition comprised of a compound having the following structure: wherein R n is between 1 and 1000, m is between 0 and 1000, and l is between 1 and 1000, and a carrier medium, the composition having a first low temperature color, a first low temperature fluorescence, a second low temperature color, a second low temperature fluorescence, a high temperature color and a high temperature fluorescence, the composition exhibiting a color change from the second low temperature color to the high temperature color and a fluorescence change from the second low temperature fluorescence to the high temperature fluorescence when the composition is exposed to a temperature that meets or exceeds a pre-determined temperature and exhibiting a color change from the high temperature color to a first low temperature color and a fluorescence change from the high temperature fluorescence to a first low temperature fluorescence when the composition is exposed to a decline in temperature from a temperature that meets or exceeds the predetermined temperature to a temperature of within the range of between about 5 to 20 ° C. below the pre-determined temperature, the decline in temperature occurring in a time period of greater than 2.0 seconds;