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:
Sep. 02, 2008
Filed:
Aug. 29, 2001
Applicants:
Markus Möller, München, DE;
Helmut Coutelle, Freising, DE;
Robert Warth, Moosburg, DE;
Wolfgang Heininger, Moosburg, DE;
Inventors:
Markus Möller, München, DE;
Helmut Coutelle, Freising, DE;
Robert Warth, Moosburg, DE;
Wolfgang Heininger, Moosburg, DE;
Assignee:
Sud-Chemie AG, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B 14/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A swellable layer silicate is described based on smectite or sepiolite/palygorskite for use in media containing di- or polyvalent cations that reduce swellability, characterized by a swelling volume of about 5 to 50 mL, measured by addition of 2 g layer silicate (air-dried) to 100 mL water, and by a fineness of maximum 5 wt. % >40 μm and maximum 20% >20 μm, as dry sieve residue.