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:
May. 18, 2010
Filed:
Mar. 10, 2003
Stipan Katusic, Kelkheim, DE;
Günther Michael, Karlstein, DE;
Peter Kress, Freigericht, DE;
Geoffrey J. Varga, Freigericht, DE;
Edwin Staab, Geiselbach, DE;
Winfried Weber, Hünfelden, DE;
Stipan Katusic, Kelkheim, DE;
Günther Michael, Karlstein, DE;
Peter Kress, Freigericht, DE;
Geoffrey J. Varga, Freigericht, DE;
Edwin Staab, Geiselbach, DE;
Winfried Weber, Hünfelden, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
Nanoscale, pyrogenically produced zinc oxide having a BET surface area of 10 to 200 m/g, which is in the form of aggregates of anisotropic primary particles and whereby the aggregates display an average diameter of 50 to 300 nm. It is obtained from zinc powder, which is converted to zinc oxide powder in the four successive reaction zones, evaporation zone, nucleation zone, oxidation zone and quench zone. It can be used in sunscreen formulations.