Patent · US Active

Security element with thin-layer element

US7923097B2 · kind B2 · utility

1Cited by

4References

57Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Manfred Heim · Munich, DE
Ralf Liebler · Darmstadt, DE
Markus Krombholz · Bad Berneck im Fichtelgebirge, DE

Key dates

Filing date	Aug 9, 2004
Grant date	Apr 12, 2011
Priority date	—
Expiry date	Oct 7, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24893
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The invention relates to a security element for security papers, documents of value and the like having a thin-layer element (12) with color shift effect, which has a reflection layer (14), an absorber layer (18) and a spacer layer (16) disposed between reflection layer (14) and absorber layer (18). According to the invention the spacer layer (16) is formed by a printed layer having dispersion particles (20) with monomodal or oligomodal size distribution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.