Ink composition comprising first and second optically variable pigments
US6472455B1 · kind B1 · utility
17Cited by
6References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Aug 24, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C2220/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink composition containing at least two different types of optically variable pigments which produce a film or coating having a viewing angle dependent color shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.