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. 16, 2018
Filed:
Jun. 12, 2009
Applicants:
Michael Bierdel, Leverkusen, DE;
Thomas König, Leverkusen, DE;
Ulrich Liesenfelder, Bergisch Gladbach, DE;
Inventors:
Michael Bierdel, Leverkusen, DE;
Thomas König, Leverkusen, DE;
Ulrich Liesenfelder, Bergisch Gladbach, DE;
Assignee:
COVESTRO DEUTSCHLAND AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 47/40 (2006.01); B29B 7/48 (2006.01); B29C 47/62 (2006.01); B29C 47/00 (2006.01); B29C 47/08 (2006.01); B29C 47/38 (2006.01); B29C 47/60 (2006.01);
U.S. Cl.
CPC ...
B29C 47/40 (2013.01); B29B 7/483 (2013.01); B29C 47/0844 (2013.01); B29C 47/0854 (2013.01); B29C 47/0861 (2013.01); B29C 47/0881 (2013.01); B29C 47/402 (2013.01); B29C 47/6056 (2013.01); B29C 47/627 (2013.01); B29C 47/0009 (2013.01); B29C 47/0825 (2013.01); B29C 47/38 (2013.01); B29C 47/60 (2013.01); Y10T 29/49316 (2015.01);
Abstract
The invention relates to novel screw elements for multi-screw extruders with screw profiles co-rotating in pairs and being fully self-wiping in pairs, to the use of the screw elements in multi-screw extruders and to a process for extruding plastic compositions.