Security document and security element for a security document
US7611168B2 · kind B2 · utility
3Cited by
22References
37Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2003 |
| Grant date | Nov 3, 2009 |
| Priority date | — |
| Expiry date | Jun 4, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2250/36
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Security element 2, 4 to be embedded in or applied to a security document so that it is visually recognizable from both sides of security document 1 is of multilayer construction and includes interference element I with a color shift effect and diffraction structures 8. Depending on the arrangement of the layers and existing diffraction structures 8 on transparent substrate S the color shift effect and/or the diffractive effects are perceptible from one or both sides of security element 2, 4. The security element is suitable in particular as two-sided windowed thread 4 and as label or transfer element 2 over hole 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.