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:
Nov. 30, 2010
Filed:
Jan. 04, 2007
Applicants:
Uwe Schachtely, Kahl am Main, DE;
Ralph Hofmann, Buchen, DE;
Günter Stein, Nidderau, DE;
Roland Schaffer, Linsengericht, DE;
Rainer Friehmelt, Köln, DE;
Inventors:
Uwe Schachtely, Kahl am Main, DE;
Ralph Hofmann, Buchen, DE;
Günter Stein, Nidderau, DE;
Roland Schaffer, Linsengericht, DE;
Rainer Friehmelt, Köln, DE;
Assignee:
Evonik Degussa GmbH, Essen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 33/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Pyrogenically prepared silicon dioxide is compacted to give crusts, in that it is subject to preliminary de-aeration, and is compacted to give crusts, and the crusts are broken and, if appropriate, classified. The tamped bulk density (to DIN EN ISO 787-11) of the silicon dioxide compacted to give crusts is from 185 to 700 g/l. It can be used as filler in rubber mixtures.