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. 01, 2013
Filed:
Nov. 09, 2009
Applicants:
Stipan Katusic, Bad Soden, DE;
Guido Zimmermann, Bruehl, DE;
Horst Miess, Kahl, DE;
Witold Katerinak, Wehr, DE;
Martin Moerters, Mobile, AL (US);
Inventors:
Stipan Katusic, Bad Soden, DE;
Guido Zimmermann, Bruehl, DE;
Horst Miess, Kahl, DE;
Witold Katerinak, Wehr, DE;
Martin Moerters, Mobile, AL (US);
Assignee:
Evonik Degussa GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/12 (2006.01); C01B 33/02 (2006.01); B01J 23/02 (2006.01); C03C 27/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Fumed silicon dioxide powder with a BET surface area of 20 to 35 m/g, characterized in that a) the number-based median particle diameter is 60 to 150 nm, and b) the proportion of particles with a diameter of 200 nm or more is at most 10%, and c) the proportion of particles with a diameter of up to 60 nm is at most 20%, based in each case on the total number of particles.