MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202647083159 A) filed by Demax Holograms Plc. on July 06, 2026, for Multilayer Foil With Embossed Diffractive Structure, Method Of Its Production, And Its Use For Optically Securing Documents.
Inventors include Monovski, Valentin Konstantinov; Pohan, Ihnat Yosifovich; Akuzov, Danail Trendafilov; Ivanovskyi, Andrii Albertovich; Stoilov, Georgi Ivanov; Dobrev, Mario Rumenov Number; and Delchev, Ivo Rumenov.
The application for the patent was published on July 10, 2026, under issue no. 28/2026.
Abstract: The present invention relates to a multilayer foil (18), which comprises a base (1) as carrier, and at least layers (3) to (8) and optionally layer (2), which are different from one another, inter alia at least one embossing layer (3), which is obtainable from at least one thermoplastic material and comprises at least one embossed diffractive structure (4), which bears at least one reflective layer (5), at least one reinforcing layer (6), at least one leveling layer (7), which is present at least in portion on the at least one reinforcing layer (6), and at least one adhesive layer (8), which is present at least in portion on the at least one leveling layer (7), a method for its preparation, a use of the multilayer foil as an origin of a diffractive device (38), a method for optically securing a document (9), which makes use of the diffractive device originating from the multilayer foil, and to a document optically secured by means of the diffractive device.
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