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. 09, 2008
Filed:
Sep. 10, 2004
MY T. Nguyen, Kirkland, CA;
Marc-andre Locas, Pierrefonds, CA;
Pierre Louis Brunner, Lachine, CA;
Jean-françois Fortin, Pierrefonds, CA;
Chuanyong Ji, Montreal, CA;
My T. Nguyen, Kirkland, CA;
Marc-Andre Locas, Pierrefonds, CA;
Pierre Louis Brunner, Lachine, CA;
Jean-François Fortin, Pierrefonds, CA;
Chuanyong Ji, Montreal, CA;
American Dye Source, Inc., Kirkland, CA;
Abstract
Described herein are a method for recording luminescent compositions, comprising a) providing a luminescent composition which comprises at least a first and second luminescent compound, wherein the first luminescent compound is a donor compound having a peak luminescent emission spectrum at a given wavelength, wherein the second luminescent compound is an acceptor compound having a peak absorption spectrum at a longer wavelength than the given wavelength, and wherein the emission spectrum of the donor compound at least partially overlaps the absorption spectrum of the acceptor compound; b) combining the composition with a substrate, so that at least a portion of the composition is available for exposure to a photon source; and c) embedding information at predetermined sites in the combined composition by localized exposure to a photon source, the embedding resulting in an information pattern when exposed to a luminescence deciphering device, and uses of said information pattern.