The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2007
Filed:
Oct. 21, 2004
Applicants:
Carsten Rosenhahn, Krefeld, DE;
Horst Brunn, Meerbusch, DE;
Wolfgang Oehlert, Krefeld, DE;
Inventors:
Assignee:
LANXESS Deutschland GmbH, Leverkusen, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09C 1/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to zinc ferrite colour pigments, including a process for preparing and using them and, more particularly, the present invention relates to light-coloured zinc ferrite colour pigments having enhanced thermal stability, a magnesium content of from 0.01%-0.4% by weight, a color difference ΔE* according to DIN 53 772 at 260° C. of <3.0, a color difference ΔE* according to DIN 53 772 at 300° C. of <5.0, and a lightness of L*, measured in PE-HD full shade according to DIN 55 772 of >52.5.