Particulate amorphous precipitated silica
US5353999A · kind A · utility
4Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1993 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Feb 16, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A statistically large population of particles of amorphous precipitated silica is substantially free of particles of amorphous precipitated silica which are retained on a 20 mesh sieve screen, and is characterized by at least 90 percent by weight of said particles of said population being retained on a 200 mesh sieve screen. Such a population may be produced by cracking amorphous precipitated silica particles between the textured rolls of at least one roll pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.