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:
Feb. 01, 2011
Filed:
Sep. 30, 2005
Hidekazu Hoshino, Yokohama, JP;
Hiroyuki Matsumoto, Yokohama, JP;
Itsuo Takeuchi, Yokohama, JP;
NHK Spring Co., Ltd., Yokohama-shi, JP;
Abstract
A thermosensitive ink layeris composed of a thermochromic material which changes from black to a transparent state and is formed on a substratemade from a PET film by heating. A cholesteric liquid crystal layeron which a hologramof an appropriate form is formed on the cholesteric liquid crystal layer is mounted thereon. At ordinary temperature, the thermosensitive ink layerexhibits a property of light absorption and a property of selective reflection and a color shifting of the cholesteric liquid crystal layerare observed. The thermosensitive ink layerbecomes transparent by heating and the figureon the substrateis also visible. The determination of the authenticity thereof is performed by utilizing the change of view. Therefore, the anticounterfeiting effects are superior to those of the discrimination techniques using conventional techniques, and this enables articles to be distinguished easily and reliably.