MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202617084552 A) filed by Oberthur Fiduciaire Sas on July 09, 2026, for Security Element For A Security Document And Security Document Comprising Such A Security Element.
Inventors include Gillot, Julien; and Borde, Xavier.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: The invention relates to a security element (2) for a security document, the security element (2) being multilayer and comprising an upper face (12) and a lower face (13) between which faces there are superposed, in this order, from the upper face (12) to the lower face (13): - a translucent layer of coloured ink (15), - an at least partially, preferably totally, transparent or translucent backing layer (17), - a relief-structures layer (19) exhibiting variable reflection so as to define an optical effect that varies according to the angle at which it is viewed and/or illuminated from the upper face (12), and - a layer (21) comprising plasmonic particles, preferably a layer (21) of plasmonic ink. The invention also relates to a security document comprising at least one such security element (2).
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