Ferrite particle having outer shell structure, ferrite carrier core material for electrophotographic developer, and electrophotographic developer
US9372426B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 2015 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Jan 16, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/42
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
It is an object of the present invention to provide a ferrite particle having a low apparent density, and being capable of maintaining various properties thereof in controllable states and filling a fixed volume in a small weight thereof, a ferrite carrier core material and a ferrite carrier for an electrophotographic developer using the ferrite particle, and the like. In order to achieve the object, there are employed the ferrite particle having a porous structure in the interior thereof and an outer shell structure on the outer periphery thereof, the ferrite carrier core material and the ferrite carrier for an electrophotographic developer using the ferrite particle, and an electrophotographic developer using the ferrite carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.