Rare earth sesquisulfide compositions comprising alkali/alkaline earth metal values
US5348581A · kind A · utility
9Cited by
2References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1992 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Dec 4, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Unique compositions based on at least one crystalline rare earth sesquisulfide, well suited for the coloration of a wide variety of substrates, e.g., cosmetics, plastics, paints and rubbers, contain a dopant amount of at least one alkali/alkaline earth metal, at least a fraction of which being included within the crystal lattice of such at least one rare earth sesquisulfide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.