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:
Aug. 21, 2012
Filed:
Mar. 05, 2010
Applicants:
Gerd Jonas, Krefeld, DE;
Richard Mertens, Krefeld, DE;
Markus Frank, Tonisvorst, DE;
Inventors:
Assignee:
Evonik Stockhausen GmbH, Krefeld, DE;
Primary Examiner:
Int. Cl.
CPC ...
A61F 13/15 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention concerns highly swellable absorption mediums with a reduced caking tendency at high humidity and/or high temperatures, wherein a swellable polymer is coated with a non-ionic, nitrogen-containing surfactant and optionally a Lewis acid and then reacted by heating.