Patent · US Expired

Oxide-coated carriers and preparation and use thereof

US5039587A · kind A · utility

6Cited by

11References

4Claims

0Family size

Assignee

BASF SE

Inventors

Erwin Czech · Biblis, DE
Werner Ostertag · Havelsee, DE
Detlef Schulze-Hagenest · Molfsee, DE
Franz-Ulrich Schmitt · Hannover, DE

Key dates

Filing date	Sep 7, 1989
Grant date	Aug 13, 1991
Priority date	—
Expiry date	Sep 7, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2993
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A novel carrier which is stable and effective over long cycle times (6.times.10.sup.6 prints), has an iron oxide coating of the formula (FeO).sub.x.Fe.sub.2 O.sub.3 where x=0.1-1 and is obtained by treating steel cores (or balls) with defined small amounts of sulfuric acid of defined concentration, partial oxidation of the cores thus treated and drying at 60.degree.-150.degree. C. at .ltoreq.100 mbar.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.