Pigmented porous material
US6495250B1 · kind B1 · utility
16Cited by
18References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1999 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Nov 16, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249997
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a colored, preferably natural porous material comprising in its pores an effectively coloring amount of an organic pigment which is obtained by fragmenting a meltable or solvent-soluble pigment precursor in the presence of a thermally activated acid precursor, and to a low to medium temperature process for its preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.