Environmentally friendly ferrite carrier core, and developer containing same
US6143456A · kind A · utility
12Cited by
21References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1999 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Nov 24, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A carrier core for use in an electrostatographic developer composition is a ferrite substantially free of copper and zinc. By being substantially free of copper and zinc, the carrier core is environmentally friendly and eliminates the need for use of conventional copper zinc carrier cores which must be handled as hazardous waste. Developer compositions employing the ferrite carrier core possess suitable properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.