The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2019
Filed:
May. 05, 2014
Giesecke & Devrient Gmbh, Munich, DE;
Kai Uwe Stock, Grunwald, DE;
Martin Stark, Munich, DE;
GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich, DE;
Abstract
The invention concerns a method for marking a feature substance, present in particular in pulverized form, with at least one marker, with the feature substance being suitable for the authentication of value documents, comprising the step of mixing the feature substance with a small quantity of the marker present in the form of particles, so that the macroscopic detectability of the feature substance is not influenced by the marker and the marker is detectable in a value document having a security feature containing the marked feature substance by means of a spatially resolving analytical method which is adapted to resolve down to the single-particle level.