Unique security device for the identification or authentication of valuable goods, fabrication process and method for securing valuable goods using such a unique security device
US9430733B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2008 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Oct 18, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/445
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A security device for the identification or authentication of valuable goods is described, including a thin material layer (22, 26) presenting a stochastic pattern including micro/submicrostructures, where the latter are arranged in blobs (2) each of which presents a complexity factorwhere L is the perimeter of the blob and A its area, and wherein blobs having a Cx value greater than or equal to 2 cover at least 5%, preferably at least 15%, of the device surface. According to a preferred embodiment, the material layer may include a film including at least a first and a second polymers arranged respectively within a first and a second phases defining the micro/submicrostructures. Preferred processes of fabrication are also disclosed, as well as a method for securing a valuable good based on such a security device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.