High surface area ferromagnetic carrier materials
US4125667A · kind A · utility
14Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1977 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | Feb 11, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Classified high surface area carrier materials having a specific surface area of at least about 150 cm.sup.2 /gram, a particle size volume distribution geometric standard deviation of less than about 1.3, and a particle size distribution wherein the carrier particles have an average particle diameter of less than about 100 microns. The carrier materials are mixed with finely-divided toner materials to form electrostatographic developer mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.