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:
Sep. 16, 2013
Laserlock Technologies Inc., Bala Cynwyd, PA (US);
Norman A. Gardner, Bala Cynwyd, PA (US);
Edward H. Bell, Glen Mills, PA (US);
Terry Stovold, Raleigh, NC (US);
LaserLock Technologies, Inc., Bala Cynwyd, PA (US);
Abstract
A light source is configured to emit a narrow peak at a discrete spectral band, especially at a primary color wavelength. The light source can have a plurality of narrow peaks to simulate the effect of a broadband light source. A subject is provided with a pigment, such as certain rare earth lanthanides, with a strong absorption peak at a corresponding narrow spectral band. The pigment has a nominal color when illuminated by a true broadband light (e.g., sunlight) that does not have a narrow peak at the discrete spectral band, and has a different color when illuminated by the light source that has a narrow peak. This color shift can be used for security authentication, information and decorative applications.