Assemblies and processes for producing optical effect layers comprising oriented non-spherical oblate magnetic or magnetizable pigment particles
US11420230B2 · kind B2 · utility
1Cited by
16References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2018 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Mar 4, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/40
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention relates to the field of optical effect layers (OEL) comprising magnetically oriented non-spherical oblate magnetic or magnetizable pigment particles on a substrate, spinneable magnetic assemblies and processes for producing said optical effect layers (OEL). In particular, the present invention relates to spinneable 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.