Pigments
US6818051B2 · kind B2 · utility
6Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2002 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Nov 14, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/84
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to particles with an opalescent effect, which have a particle size in the range from 5 &mgr;m to 5000 &mgr;m, comprising monodisperse spheres having a diameter of 50 nm to 2 &mgr;m with a standard deviation of less than 5% in a packed and regularly ordered structure which is three-dimensional in terms of domains and is mechanically stabilized by physical or chemical modification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.