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:
Mar. 05, 2019
Filed:
Nov. 23, 2016
Applicant:
Evonik Degussa Gmbh, Essen, DE;
Inventors:
Masanobu Kaneeda, Suzuka, JP;
Rainer Lamann, Bergheim, DE;
Jens Peltzer, Grafschaft, DE;
Farideh Yamchi, Hürth, DE;
Jürgen Behnisch, Rheinbach, DE;
Assignee:
Evonik Degussa GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09C 1/30 (2006.01); G03G 9/08 (2006.01); G03G 9/10 (2006.01); C01B 33/18 (2006.01); G03G 9/097 (2006.01);
U.S. Cl.
CPC ...
G03G 9/10 (2013.01); C01B 33/18 (2013.01); C09C 1/3063 (2013.01); C09C 1/3081 (2013.01); G03G 9/0819 (2013.01); G03G 9/09716 (2013.01); G03G 9/09725 (2013.01); C01P 2004/32 (2013.01); C01P 2004/54 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2006/82 (2013.01);
Abstract
The invention relates to a hydrophobic silica powder which is unprecedentedly insensitive to environmental humidity with which electrophotographic toner can possess stable electro static charge that leads to stable quality of printed image. The hydrophobic silica powder has the following physicochemical properties;