Reflective organic layers

Optical: systems and elements – Optical modulator – Light wave temporal modulation

Reexamination Certificate

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Reexamination Certificate

active

07151626

ABSTRACT:
The present invention pertains to organic reflective layers comprising an organic radical cation compound, wherein the layer reflects in the infrared region. Preferably, the organic radical cation compound is a salt of an aminium radical cation. Also provided are marking systems comprising such reflective layers and methods of marking an article utilizing such reflective layers.

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patent: 5956175 (1999-09-01), Hajnowski
patent: 6461793 (2002-10-01), Chang et al.
patent: 6475590 (2002-11-01), Kitayama et al.

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