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:
Oct. 05, 2004
Filed:
Sep. 09, 2002
Applicant:
Inventors:
Herbert Barthel, Emmerting, DE;
Mario Heinemann, Burghausen, DE;
Franz Grünwald, Haiming, DE;
Helmut Maginot, Burghausen, DE;
Ute Völkel, Burghausen, DE;
Assignee:
Wacker-Chemie GmbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/00 ; C01B 3/312 ; C01F 7/02 ; C01G 2/3047 ;
U.S. Cl.
CPC ...
G03G 9/00 ; C01B 3/312 ; C01F 7/02 ; C01G 2/3047 ;
Abstract
A silylated silica having an SiOH density per nm of less than 0.6, based on the BET-method surface area (DIN 66131 and 66132), is prepared by silylating silica in a process where loading, reacting, and purifying are performed in separate steps.