Substrate for packaging perishable goods or for application...

Chemistry: analytical and immunological testing – Optical result

Reexamination Certificate

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Details

C436S166000, C436S004000, C422S050000, C422S051000, C422S051000, C422S051000

Reexamination Certificate

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07081364

ABSTRACT:
The invention relates to a substrate for packaging of or for attachment to products which are sensitive to aging and temperature, having a planar time-temperature integrator comprising a matrix and at least one reversible indicator embedded therein, which has photochromic properties on the basis of transfix reactions, arranged in the region of the substrate.

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Journal of Physical Chemistry, “Photochromism and Thermochromism Driven by Intramolecular Proton Transfer in Dinitrobenzylpyridine Compounds” Corval et al. 1996.
Journal of Physical Chemistry, “Quantum Chemical Investigation of the Thermal and Photoinduced Proton-Transfer Reactions of 2-(2,4-Dinitrobenzy)pyridine” Frank et al. 1996.
Michael, Scherl et al., Proton Transfer Processes in Well-Defined Media: Experimental Investigation of Photoinduced and Thermal Proton-Transfer Processes in Single Crystals of 2-(2,4-Dinitrobenzyl) pyridine Derivatives, J. Phys. Chem. 1996, pp. 16175-16186.

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