Assemblies and processes for producing optical effect layers comprising oriented non-spherical oblate magnetic or magnetizable pigment particles
US11660902B2 · kind B2 · utility
1Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2018 |
| Grant date | May 30, 2023 |
| Priority date | — |
| Expiry date | Jan 13, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to the field of optical effect layers (OEL) including magnetically oriented non-spherical oblate magnetic or magnetizable pigment particles on a substrate, spinneable magnetic assemblies and processes for producing optical effect layers (OEL). In particular, the present invention relates to spinneable magnetic assemblies and processes for producing 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.