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:
Jun. 02, 2026
Filed:
Oct. 19, 2021
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Thomas Koenig, Leverkusen, DE;
Ulrich Liesenfelder, Bergisch Gladbach, DE;
Roland Engberg, Düsseldorf, DE;
Gudrun Schmidt, Leverkusen, DE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 48/405 (2019.01); B29C 48/25 (2019.01); B29C 48/27 (2019.01); B29C 48/40 (2019.01); B29C 48/605 (2019.01); B29C 48/65 (2019.01);
U.S. Cl.
CPC ...
B29C 48/405 (2019.02); B29C 48/2517 (2019.02); B29C 48/2715 (2019.02); B29C 48/402 (2019.02); B29C 48/605 (2019.02); B29C 48/65 (2019.02);
Abstract
A multishaft extruder is provided having screw shafts that rotate in the same sense and at the same speed, wherein these screw shafts each have at least one region having a special arrangement of screw elements, wherein the screw elements have an asymmetrical cross-sectional screw profile. In this case, the at least one region is situated directly opposite on directly adjacent screw shafts. The the use of the extruder for processing or production of plastic or viscoelastic masses is also provided.