Patent · US Expired

Security element and method for producing the same

US8622435B2 · kind B2 · utility

0Cited by

11References

37Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Theodor Burchard · Tegernsee, DE
Winfried Hoffmuller · Bad Tölz, DE
Thorsten Pillo · Holzkirchen, DE
Manfred Heim · Munich, DE
Friedrich Kretschmar · Munich, DE
Jurgen Ruck · Schliersee, DE

Key dates

Filing date	Aug 8, 2005
Grant date	Jan 7, 2014
Priority date	—
Expiry date	May 24, 2026

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB42D2035/34
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The present invention relates to a security element (30) for securing valuable articles, having a first layer (13), composed of cholesteric liquid crystal material, that is present at least in some areas, a second layer (14), composed of liquid crystal material, that is present at least in some areas, and a further layer (22), having a machine-readable feature, that is present at least in some areas and that is covered at least in some areas by the first and second layer composed of liquid crystal material.

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