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:
Jun. 30, 2009
Filed:
Aug. 11, 2006
Stipan Katusic, Kelkheim, DE;
Michael Kroell, Gelnhausen, DE;
Michael Kraemer, Schoeneck, DE;
Stefan Heberer, Gelnhausen, DE;
Edwin Staab, Geiselbach, DE;
Guenther Michael, Karlstein, DE;
Stipan Katusic, Kelkheim, DE;
Michael Kroell, Gelnhausen, DE;
Michael Kraemer, Schoeneck, DE;
Stefan Heberer, Gelnhausen, DE;
Edwin Staab, Geiselbach, DE;
Guenther Michael, Karlstein, DE;
Degussa AG, Duesseldorf, DE;
Abstract
Cerium oxide powder having carbonate groups and made of crystalline primary particles containing cerium oxide and having carbonate groups on the surface and in a region close to the surface, and having a BET surface area of from 25 to 150 m/g, a mean diameter of from 5 to 50 nm, a carbonate concentration in the region close to the surface decreasing inwardly from the surface, a carbon content due to carbonate groups on the surface of from 5 to 50% by area, a carbon content due to carbonate groups at a depth of about 5 nm in a region close to the surface of from 0 to 30% by area, a content of cerium oxide calculated as CeOand based on the powder of at least 99.5% by weight and a content of organic and inorganic carbon of from 0.01 to 0.3% by weight. A dispersion containing this powder.