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:
Jan. 24, 2023
Filed:
Dec. 15, 2017
Applicant:
Basf SE, Ludwigshafen am Rhein, DE;
Inventors:
Monica Haag, Ludwigshafen, DE;
Stephan Deuerlein, Ludwigshafen, DE;
Roland Krauss, Ludwigshafen, DE;
Volker Klock, Ludwigshafen, DE;
Holger Barthel, Ludwigshafen, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 3/075 (2006.01); B29C 48/68 (2019.01); B29C 48/00 (2019.01); B29C 48/395 (2019.01); B29C 48/53 (2019.01); B29C 48/625 (2019.01); B29C 48/685 (2019.01); B29B 7/42 (2006.01); B29B 7/82 (2006.01); B29C 48/05 (2019.01); B29C 48/345 (2019.01); B29C 48/535 (2019.01); B29C 48/04 (2019.01); C08J 3/24 (2006.01);
U.S. Cl.
CPC ...
C08J 3/075 (2013.01); B29B 7/422 (2013.01); B29B 7/429 (2013.01); B29B 7/826 (2013.01); B29C 48/022 (2019.02); B29C 48/05 (2019.02); B29C 48/397 (2019.02); B29C 48/53 (2019.02); B29C 48/625 (2019.02); B29C 48/681 (2019.02); B29C 48/687 (2019.02); B29C 48/04 (2019.02); B29C 48/345 (2019.02); B29C 48/535 (2019.02); C08J 3/245 (2013.01); C08J 2333/02 (2013.01);
Abstract
A single-screw extruder for changing a morphology of superabsorbent polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw in the invention has a first pitch value of a pitch of the screw flights along the conveying zone of the channel and, following in conveying direction, has a second pitch value of the pitch of the screw flights along the conveying zone of the channel, where the second pitch value is smaller than the first pitch value.