Magnetic carrier powder having a wide chargeable range of electric resistance useful for magnetic brush development
US4485162A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1983 |
| Grant date | Nov 27, 1984 |
| Priority date | — |
| Expiry date | Feb 8, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic carrier powder composed essentially of particles of a ferrite having a composition represented by the formula EQU (MO).sub.100-x (Fe.sub.2 O.sub.3).sub.x where M is Mg, Mn, Zn, Ni, a combination of Mg in an atomic ratio of at least 0.05 with at least one metal selected from the group consisting of Zn, Cu, Mn and Co, a combination of Mn in an atomic ratio of at least 0.05 with at least one metal selected from the group consisting of Zn, Cu, Mg and Co, or a combination of Ni in an atomic ratio of at least 0.05 with at least one metal selected from the group consisting of Zn, Mg, Mn, Cu and Co, and x is greater than 53 molar %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.