Apparatuses and processes for producing optical effect layers comprising oriented non-spherical magnetic or magnetizable pigment particles
US10737526B2 · kind B2 · utility
1Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2017 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Sep 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/16
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to the field of magnetic assemblies and processes for producing optical effect layers (OEL) comprising magnetically oriented non-spherical magnetic or magnetizable pigment particles on a substrate. In particular, the present invention relates to magnetic assemblies and processes for producing said OELs as anti-counterfeit means on security documents or security articles or for decorative purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.