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:
Jan. 20, 2026
Filed:
Feb. 09, 2022
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
Mareike Giesseler, Maintal, DE;
Frank Menzel, Hanau, DE;
Alexander Lygin, Griesheim, DE;
Rainer Golchert, Dieburg, DE;
Assignee:
Evonik Operations GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/097 (2006.01); C01B 33/141 (2006.01); C09D 183/04 (2006.01); G03G 9/113 (2006.01);
U.S. Cl.
CPC ...
C01B 33/1417 (2013.01); C09D 183/04 (2013.01); G03G 9/1136 (2013.01); C01P 2004/61 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01);
Abstract
Surface-treated fumed silica, with a tribo-electro static charge of −500 μC/g to +500 μC/g, a ratio of the tribo-electro static charge to BET surface area of −3.5 μC/mto +3.5 μC/m, a methanol wettability of at least 20% by volume methanol in methanol/water mixture, a ratio of carbon content to BET surface area of at most 0.020 wt. %*g/m, a process for its preparation and the use thereof.