Patent · US Active

Dual security mark

US7713616B2 · kind B2 · utility

4Cited by

5References

29Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Matthias Kuntz · Seeheim-Jugenheim, DE
Burkhard Krietsch · Dieburg, DE
Andreas Walter · Egloffstein, DE

Key dates

Filing date	Apr 30, 2004
Grant date	May 11, 2010
Priority date	—
Expiry date	Jun 3, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2991
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a flat dual security feature which comprises two different security components, one of which can be verified in the visible spectral region and one of which can be verified in the ultraviolet spectral region of light, and which comprises flake-form effect pigments and luminescent pigments in such a low concentration that the latter are evident to the naked eye as individual particles under the action of UV light; to a process for the production thereof, and to the use thereof.

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