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:
May. 02, 2006
Filed:
Mar. 19, 2003
Satoshi Narita, Shinjuku-ku, JP;
Koji Eto, Shinjuku-Ku, JP;
Hideshi Hattori, Shinjuku-Ku, JP;
Daisuke Matsuura, Shinjuku-Ku, JP;
Kazutoshi Awano, Shinjuku-Ku, JP;
Satoshi Narita, Shinjuku-ku, JP;
Koji Eto, Shinjuku-Ku, JP;
Hideshi Hattori, Shinjuku-Ku, JP;
Daisuke Matsuura, Shinjuku-Ku, JP;
Kazutoshi Awano, Shinjuku-Ku, JP;
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a security element which is low in cost, is difficult to forge or alter, and can be applied to objects where a high level of security is required. The security element comprises at least a substrate and a fluorescent colorant layer provided on the substrate, wherein the fluorescent colorant layer comprises N species of fluorescent colorants F, wherein N is an integer of 2 or more and n is an integer of not less than one and not more than N, in the same layer, and the fluorescent colorant Fabsorbs light with a wavelength of λand emits fluorescence with a wavelength of λ.