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.:

US 7189575 B1

PDF
Full Text
Expired
Date of Patent:
Mar. 13, 2007

Filed:

Nov. 08, 2001
Applicants:

Wolfgang Schrof, Neuleiningen, DE;

Udo Gödert, Ebertsheim, DE;

Martin Beck, Maxdorf, DE;

Hans-joachim Hähnle, Neustadt, DE;

Gunnar Schornick, Neuleiningen, DE;

Inventors:

Wolfgang Schrof, Neuleiningen, DE;

Udo Gödert, Ebertsheim, DE;

Martin Beck, Maxdorf, DE;

Hans-Joachim Hähnle, Neustadt, DE;

Gunnar Schornick, Neuleiningen, DE;

Assignee:

BASF Aktiengesellschaft, Ludwigshafen, DE;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 20/00 (2006.01); A61F 13/15 (2006.01); C12Q 1/68 (2006.01); G01N 15/06 (2006.01); G01N 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

Disclosed is a method for determining the swellability and the swelling kinetics of superabsorbent material () such as polymer gels, for example, which comprises introducing a defined volume of the dry superabsorbent material () into a measuring vessel (), using a movable element () within said measuring vessel () to apply a restraining force () to said superabsorbent material () and capturing the expansion of said superabsorbent material () contactlessly within a chamber () in a continuous manner by capturing the change in height of a piston () which bounds said chamber (), travels in a measuring vessel () and is marked with a height scale ().


Find Patent Forward Citations

Schrof, Wolfgang. (2007). Method and device for determining the swelling behavior of polymer gels under pressure (U.S. Patent No. 7189575). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7189575

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