Paired optically variable article with paired optically variable structures and ink, paint and foil incorporating the same and method
US5766738A · kind A · utility
48Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An optically variable article comprising of a substrate and at least one non-overlapping pair of optically variable structures on the surface of the substrate, the optically variable structures having the same color at one angle of incidence and different colors at all other angles of incidence. The optically variable structures are formed from optically variable pigments, optically variable opaque foils, or optically variable multilayer thin film interference stacks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.