Patent · US Active

Authenticity mark in the form of luminescent substances

US8367188B2 · kind B2 · utility

1Cited by

2References

25Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Stephan Heer · Birkenfeld, DE
Thomas Giering · Kirchseeon, DE
Kai Uwe Stock · Grünwald, DE
Gregor Grauvogl · Hersbruck, DE

Key dates

Filing date	Oct 9, 2007
Grant date	Feb 5, 2013
Priority date	—
Expiry date	Dec 7, 2028

Classification

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

Abstract

A printed document of value has an authenticity feature in the form of at least two luminescent substances on the basis of host lattices which are doped with one or a plurality of ions. By systematically changing the host lattices and/or ions of the (nd)3 electron configuration a specific setting of the luminescence properties of luminescent substances is possible, the combination of which permits a multiplicity of complex new authenticity features.

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