Luminescent pigments and their use in security applications
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United States of America Patent
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Mar 24, 2015
Grant Date -
Jun 12, 2014
app pub date -
Feb 10, 2012
filing date -
Feb 11, 2011
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Abstract
The present invention relates to a new family of luminescent pigments consisting of a salt of two ruthenium(II) complex ions of opposite sign charges comprising N-chelating heterocyclic ligands and to their use in security applications to prevent counterfeiting. The invention also refers to ink compositions and to the security documents or secured goods comprising said luminescent pigments.
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