Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Roland Schaffer0
Günter Stein0
Rainer Friehmelt0
Ralph Hofmann0
Uwe Schachtely0
Date of Patent
November 30, 2010
0Patent Application Number
120956500
Date Filed
January 4, 2007
0Patent Citations Received
Patent Primary Examiner
Patent 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.
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