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:
Apr. 17, 2018
Filed:
May. 30, 2009
Thomas Koenig, Leverkusen, DE;
Michael Bierdel, Leverkusen, DE;
Ulrich Liesenfelder, Bergisch-Gladbach, DE;
Klemens Kohlgrüber, Kuerten, DE;
Johann Rechner, Kempen, DE;
Thomas Koenig, Leverkusen, DE;
Michael Bierdel, Leverkusen, DE;
Ulrich Liesenfelder, Bergisch-Gladbach, DE;
Klemens Kohlgrüber, Kuerten, DE;
Johann Rechner, Kempen, DE;
COVESTRO DEUTSCHLAND AG, Leverkusen, DE;
Abstract
The invention relates to a process for extruding plastic compositions, in particular polymer melts and mixtures of polymer melts, above all thermoplastics and elastomers, particularly preferably polycarbonate and polycarbonate blends, also with the incorporation of other substances such as for example solids, liquids, gases or other polymers or other polymer blends with improved optical characteristics, with the assistance of a multi-screw extruder with specific screw geometries.