Silicas
US4956167A · kind A · utility
18Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1989 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Mar 22, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An amorphous silica, especially precipitated silica, suitable for use in toothpastes, has a high abrasivity represented by a perspex abrasion value in the range from about 23 to about 35.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.