Patent · US Active

Screw elements with improved dispersing action and low energy input

US9688002B2 · kind B2 · utility

1Cited by

11References

25Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Michael Bierdel · Leverkusen, DE
Thomas König · Nuremberg, DE
Ulrich Liesenfelder · Bensberg, DE

Key dates

Filing date	Jun 6, 2009
Grant date	Jun 27, 2017
Priority date	—
Expiry date	Apr 11, 2032

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C48/03
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The present invention relates to new screw elements for multi-screw extruders with pairs of co-rotating and fully wiping screws.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.