Patent · US Expired

Platelet-shaped iron oxide pigments

US4780140A · kind A · utility

12Cited by

2References

16Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Klaus-Dieter Franz · Kelkheim, DE
Reiner Esselborn · Darmstadt, DE
Ralf Emmert · Bayonne, US
Hans-Dieter Bruckner · Darmstadt, DE

Key dates

Filing date	Oct 22, 1987
Grant date	Oct 25, 1988
Priority date	—
Expiry date	Oct 22, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2004/84
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The invention relates to platelet-shaped pigments of the formula Al.sub.x Fe.sub.2-x O.sub.3-y, wherein x has a value from 0.02 to 0.5 and y has a value from 0.3 to 1.0, which are optionally coated with further oxides.

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