Patent ID: 9665815
Date: 2017-05-30
CPC Classifications: B42D,B82Y,C23C,G06K,Y10S

Claim:
1. An identification card comprising: a card body adapted to substantially transmit radiation in a visible light wavelength region; card issuer identification information disposed on said card body, card user identification information disposed on said card body, and optionally a graphic image, a design or photograph disposed on or within said card body; said card body comprising an optically recognizable material selected from at least one of an infrared ink and/or an infrared film, wherein said at least one infrared ink comprises at least one infrared blocking dye and the same or different nanoparticles, wherein said at least one infrared film comprises the same or different nanoparticles and other metal oxide and/or non-oxide complexes sputtered on a substrate, wherein said at least one infrared ink and said at least one infrared film block transmission of incident infrared radiation, and wherein said same or different nanoparticles are selected from rare earth nanophosphors comprising a plurality of monodisperse particles having: