Patent · US Active

Authenticity mark in the form of a luminescent substance

US8497012B2 · kind B2 · utility

0Cited by

2References

26Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

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

Key dates

Filing date	Oct 9, 2007
Grant date	Jul 30, 2013
Priority date	—
Expiry date	Jun 16, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24934
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A printed document of value having at least one authenticity feature in the form of a luminescent substance on the basis of host lattices which are doped with one or a plurality of ions. Since the host lattices are doped with different ions, exchange interactions between clusters of ions that occur leads to cooperative effects.

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