Process for oxidation of carrier particles
US4425383A · kind A · utility
5Cited by
11References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1982 |
| Grant date | Jan 10, 1984 |
| Priority date | — |
| Expiry date | Jul 6, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1075
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention is directed to an improved process for treating steel carrier core surfaces which comprises providing a steel carrier core composition, oxidizing in the air stream the surface of the carrier core at a temperature of from about 500 degrees Fahrenheit to about 1,000 degrees Fahrenheit, adding water to the air stream prior to accomplishing the oxidation reaction, at a partial pressure of water in excess of 20 millimeters of mercury, thereby resulting in carrier cores having a resistance of from about 10.sup.5 ohm-cm to about 10.sup.12 ohm-cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.