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. 19, 2019
Filed:
Oct. 11, 2012
Elizabeth Anne Downing, Sunnyvale, CA (US);
Johannes Georg Schaede, Wurzburg, DE;
Elizabeth Anne Downing, Sunnyvale, CA (US);
Johannes Georg Schaede, Wurzburg, DE;
Other;
Abstract
There is described a security element or document comprising a substrate () and at least a first dynamic-effect feature () provided on the substrate which includes a dynamic-effect component that is responsive to illumination stimulus of a selected excitation wavelength or wavelength band to produce an optical spectral response, which optical spectral response changes dynamically over an observable period of time between multiple color appearances (C, F, M; C, M) upon and while being subjected to the illumination stimulus. The first dynamic-effect feature is provided in a region of the substrate which is proximate or adjacent to at least one proximity feature () provided on the substrate, which at least one proximity feature has a color appearance which is selected to enhance and/or complement at least one of the multiple color appearances of the first dynamic-effect feature.