Printed matter – Having revealable concealed information – fraud preventer or... – Utilizing electromagnetic radiation
Reexamination Certificate
2008-02-11
2011-12-27
Ross, Dana (Department: 3725)
Printed matter
Having revealable concealed information, fraud preventer or...
Utilizing electromagnetic radiation
C283S085000, C283S091000, C235S491000
Reexamination Certificate
active
08083264
ABSTRACT:
A document includes a paper substrate having an average surface roughness of at least about 0.5 microns, wherein the paper substrate includes encoded information printed thereon, and wherein the encoded information is printed with an ink comprised of light absorbing material that absorbs light only at wavelengths below 350 nm and an optional clear binder in a solvent. The encoded information is substantially not detectable to a naked human eye through differential gloss or exposure to light having wavelengths of 365 nm or more, and is only revealed upon exposing the document to light having a wavelength at which the light absorbing material absorbs light, which is less than 350 nm.
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Halfyard Kurt I.
Iftime Gabriel
Kazmaier Peter M.
Smith Paul F.
Grabowski Kyle
Oliff & Berridg,e PLC
Ross Dana
Xerox Corporation
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