Near infrared ink security feature

Details Near infrared ink security feature Near infrared ink security feature

2011-06-21

2011-06-21

Le, Thien M. (Department: 2887)

Registers

Records

Fluorescent, phosphorescent, radiation emitting

C235S375000, C235S379000, C235S380000, C235S454000, C235S455000, C235S457000, C235S487000

Reexamination Certificate

active

07963450

ABSTRACT:
Systems and methods of providing a covert security marking for items such as documents, packaging, credit cards, and other valuable goods to combat the steady increase in forgery, counterfeiting, and other fraudulent activities is presented. A spectrally narrow, near infrared ink system serves as the basis of a covert security feature for items of value. Alternatively, or in combination, metal oxides having a substantially narrow absorption band and a maximum absorption wavelength of electromagnetic radiation in the near infrared range are also utilized.

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International Search from International Application No. PCT/US2008/07646 dated Sep. 8, 2008.

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