Secure core material for documents

Details Secure core material for documents Secure core material for documents

2011-05-10

2011-05-10

Lee, Michael G (Department: 2876)

Registers

Records

Fluorescent, phosphorescent, radiation emitting

C235S380000, C252S408100, C427S007000, C222S016000

Reexamination Certificate

active

07938333

ABSTRACT:
Particles conveying a code are incorporated into polymer matrix to form a core document substrate. These particles may be colored to create a distinctive look of the document that makes it unique for a particular document issuer and enables visual authentication. Addition of a covert attribute to the particle, such as a UV pigment or hidden layer of material, allows a covert, forensic characteristic and it also allows a mathematical description to be calculated describing the random distribution of a specific area on a document and then captured on it (e.g., in the bar code or magnetic stripe or digital watermark on an ID document).

REFERENCES:
patent: 4046287 (1977-09-01), Hoekstra et al.
patent: 4053433 (1977-10-01), Lee
patent: 6309690 (2001-10-01), Brogger et al.
patent: 7823791 (2010-11-01), Jones
patent: 2002/0168513 (2002-11-01), Hattori et al.
patent: 2004/0181671 (2004-09-01), Brundage et al.
patent: 2005/0031838 (2005-02-01), Lagunowich et al.

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