Luminescent borates, materials and articles incorporating such borates, and methods and apparatus for their production and use in article authentication

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United States of America Patent

PATENT NO 9074137
APP PUB NO 20130119274A1
SERIAL NO

13672109

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Abstract

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Embodiments include luminescent materials and associated production methods. The material includes a crystal borate having a first substitutable element, neodymium substituted for the first substitutable element at a first substitution percentage of at least about 20 percent, and ytterbium substituted for the first substitutable element at a second substitution percentage. The material also may include chromium substituted for a second substitutable element. The material also may include a medium within which particles of the borate are incorporated. The medium, with the luminescent material particles, may form a security feature of an article. Embodiments of methods for identifying whether such a luminescent material is incorporated with an article include exposing a portion of the article to excitation in a chromium absorption band, and determining whether a detected emission produced by the article as a result of the excitation indicates an ytterbium emission after termination of the exposing step.

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Patent Owner(s)

Patent OwnerAddress
HONEYWELL INTERNATIONAL INCINTELLECTUAL PROPERTY SERVICES GROUP 855 S MINT STREET CHARLOTTE NC 28202

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kane, James Lawrenceville, US 60 2351
Lau, Carsten Garbsen, DE 21 131
Rapoport, William Ross Bridgeport, US 29 395

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