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:
Dec. 30, 2008
Filed:
May. 14, 2003
Wolfgang Lortz, Wächtersbach, DE;
Christoph Batz-sohn, Hanau, DE;
Steffen Hasenzahl, Hanau, DE;
Gabriele Perlet, Groβkrotzenburg, DE;
Werner Will, Gelnhausen, DE;
Ralf Mathiak, Gladbeck, DE;
Klaus Jenni, Essen, DE;
Wolfgang Lortz, Wächtersbach, DE;
Christoph Batz-Sohn, Hanau, DE;
Steffen Hasenzahl, Hanau, DE;
Gabriele Perlet, Groβkrotzenburg, DE;
Werner Will, Gelnhausen, DE;
Ralf Mathiak, Gladbeck, DE;
Klaus Jenni, Essen, DE;
Degussa AG, Duesseldorf, DE;
Goldschmidt AG, Essen, DE;
Abstract
An aqueous dispersion containing pyrogenically prepared oxide particles of titanium, zinc, iron or cerium with an average particle size, expressed as the median, in the dispersion of less than 250 nm, that the particle sizes of the oxide particles in the dispersion are not distributed symmetrically and the dispersion contains, as a dispersant, at least one compound of the formula (I) and/or a maleic anhydride/acrylate copolymer of the general formula (IIa) and/or a maleate/acrylate copolymer of the general formula (IIb). It is prepared by dispersing a predispersion stream by means of a high energy mill. It can be used in sunscreen formulations.