Processes for producing optical effects layers
US10328739B2 · kind B2 · utility
2Cited by
22References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2016 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Jun 4, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q30/0185
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The invention relates to the field of the protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the invention relates to processes for producing optical effect layers (OELs) comprising a motif made of at least two areas made of a single hardened layer on a substrate comprising a photomask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.