Patent · US Expired

Optically variable marking

US7081282B2 · kind B2 · utility

15Cited by

6References

27Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Matthias Kuntz · Seeheim-Jugenheim, DE
Reiner Delp · Darmstadt, DE
Rodney Riddle · Holzminden, DE
John Patrick · Carthage, US
Robert Hammond-Smith · Fordingbridge, GB

Key dates

Filing date	Jul 1, 2002
Grant date	Jul 25, 2006
Priority date	—
Expiry date	Feb 17, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24917
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The invention relates to an optically variable marking comprising a semiopaque substrate with a first surface that is covered with an optically variable layer that is for example a liquid crystal polymer layer or a layer comprising pearlescent pigments, and a second surface that is partially covered with a metal layer in the shape of a pattern, to methods of its preparation and to its use for decorative or security applications.

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