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:
Oct. 22, 2013
Filed:
Jun. 09, 2006
Wolfgang Lortz, Waechtersbach, DE;
Christoph Batz-sohn, Hanau, DE;
Gabriele Perlet, Grosskrotzenburg, DE;
Heinz Lach, Rodenbach, DE;
Werner Will, Gelnhausen, DE;
Wolfgang Lortz, Waechtersbach, DE;
Christoph Batz-Sohn, Hanau, DE;
Gabriele Perlet, Grosskrotzenburg, DE;
Heinz Lach, Rodenbach, DE;
Werner Will, Gelnhausen, DE;
Evonik DEGUSSA GmbH, Duesseldorf, DE;
Abstract
Aluminum oxide dispersion, which is stable in a pH range 5 from 5 to 9 and has an aluminum oxide content of at least 40 wt. %, obtainable by dispersing pyrogenically produced aluminum oxide particles in an aqueous phase, wherein one or several at least dibasic hydroxycarboxylic acids present dissolved in the dispersion and at least one salt of a 10 dialkali metal hydrogen phosphate and/or alkali metal dihydrogen phosphate are added to the aqueous phase each mutually independently in a quantity of 0.3−3×10mol/m2 of aluminum oxide specific surface area.