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. 19, 2010
Filed:
Nov. 13, 2007
Applicants:
Hans-dieter Christian, Alzenau, DE;
Juergen Schubert, Gelnhausen, DE;
Uwe Schmeier, Hasselroth, DE;
Inventors:
Assignee:
Evonik Degussa GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08K 3/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A surface-modified precipitated silica, useful as a matting agent, contains the silica having a polymer on a surface thereof. The surface-modified precipitated silica improves the transmission of a clear coating material, having a refractive index of n20=1.4492 and containing 5% by weight of said silica, by at least 20%, in comparison to the same clear coating material containing 5% by weight of a reference precipitated silica surface treated with a polyethylene wax.