Patent · US Active

Forgery-proof security element with color shift effect

US8678442B2 · kind B2 · utility

6Cited by

6References

31Claims

0Family size

Assignee

HUECK FOLIEN GES.M.B.H. · AT

Inventors

Martin Bergsmann · Linz, AT
Friedrich Kastner · Eferding, AT
Jürgen Keplinger · Ansfelden, AT
Georg Bauer · Koblenzer Straße, DE
Harald Walter · Horgen, CH

Key dates

Filing date	Aug 2, 2011
Grant date	Mar 25, 2014
Priority date	—
Expiry date	Aug 2, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24802
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A tamper-proof security element includes at least one polymer spacer layer and two metal cluster layers. One or more of the layers, in addition to their function, fulfills a security feature in their color-shift set-up.

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