Patent ID: 7833438

Claim:
A method of determining the genuineness of an article which comprises: providing a composition comprised of a compound having the following structure: wherein R 1 -R 6 =a hydrogen, substituted or unsubstituted alkyl radical, substituted or unsubstituted alkoxy radical, substituted or unsubstituted aryl radical, substituted or unsubstituted thioalkyl radical, substituted or unsubstituted trialkylsilyl radical, substituted or unsubstituted acyl radical, substituted or unsubstituted ester radical, substituted or unsubstituted amine radical, substituted or unsubstituted amide radical, substituted or unsubstituted aryl radical or substituted or unsubstituted aryl radical, 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; treating at least a portion of an article with the composition; and detecting the change from the second low temperature color to the high temperature color and the change from the second low fluorescence to the high temperature fluorescence or optionally detecting the change from the high temperature color to the first low temperature color and the change from the high temperature fluorescence to the low temperature fluorescence.