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:
Feb. 25, 2014
Filed:
Mar. 19, 2009
Andre Wehmeier, Rheine, DE;
Oleg Stenzel, Frankfurt am Main, DE;
Weicheng Wu, Recklinghausen, DE;
Christian Goetz, Seligenstadt, DE;
Werner Niedermeier, Bruehl, DE;
Marinus Haddeman, Bergisch-Gladbach, DE;
Anke Blume, Weilerswist, DE;
Andre Wehmeier, Rheine, DE;
Oleg Stenzel, Frankfurt am Main, DE;
Weicheng Wu, Recklinghausen, DE;
Christian Goetz, Seligenstadt, DE;
Werner Niedermeier, Bruehl, DE;
Marinus Haddeman, Bergisch-Gladbach, DE;
Anke Blume, Weilerswist, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
The present invention relates to precipitated silicic acids, which have a particularly narrow particle size distribution in combination with a special pore size distribution, to a method for the production thereof, and to the use thereof as a filler for rubber mixtures.