The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2014
Filed:
Jan. 18, 2012
Nabil Lawandy, Saunderstown, RI (US);
Andrei Smuk, Smithfield, RI (US);
Leif Olson, Riverside, RI (US);
Charles Zepp, Hardwick, MA (US);
Nabil Lawandy, Saunderstown, RI (US);
Andrei Smuk, Smithfield, RI (US);
Leif Olson, Riverside, RI (US);
Charles Zepp, Hardwick, MA (US);
Spectra Systems Corporation, Providence, RI (US);
Abstract
A system and method for authentication of secure products is disclosed. The security feature contains a first component in the form of an emitter capable of emitting light in response to external pump light. The security feature also contains a second component in the form of a taggant that absorbs light in a spectrally narrow range compared to the broader excitation spectrum of the first material. In this manner the emitter and taggant work in combination with one another to create an emission response significantly dependent on the illumination wavelengths and unique to the specific combination of the components. The emitter and taggant can be in the form of a mixture. Further the emitter and taggant may be applied in close proximity to one another, such as within two separate coating layers on a suitable substrate.