Patent · US Active

Effect pigment, production method, value document and printing ink

US12129382B2 · kind B2 · utility

0Cited by

2References

22Claims

0Family size

Assignee

GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH · DE

Inventors

Michael Rahm · Bad Tölz, DE
Manfred Heim · Munich, DE
Raphael Dehmel · Neubeuern, DE
Winfried Hoffmuller · Bad Tölz, DE

Key dates

Filing date	Nov 20, 2020
Grant date	Oct 29, 2024
Priority date	—
Expiry date	Jun 22, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2006/42
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A platelet-shaped magnetic effect pigment is provided for use in a printing ink, and includes a layer construction with a magnetic layer and at least one optical functional layer, such that the magnetic layer is based on a magnetic material having a column-shaped nanostructure and the magnetic columns respectively have a largely uniform preferential magnetic direction deviating from the platelet plane.

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