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:
Nov. 07, 2017
Filed:
Jun. 09, 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 47/08 (2006.01); B29B 7/48 (2006.01); B29C 47/38 (2006.01); B29C 47/40 (2006.01); B29C 47/64 (2006.01); B29C 47/62 (2006.01); B29C 47/60 (2006.01); B29C 47/00 (2006.01);
U.S. Cl.
CPC ...
B29C 47/0861 (2013.01); B29B 7/481 (2013.01); B29C 47/0881 (2013.01); B29C 47/38 (2013.01); B29C 47/402 (2013.01); B29C 47/6056 (2013.01); B29C 47/6075 (2013.01); B29C 47/625 (2013.01); B29C 47/627 (2013.01); B29C 47/64 (2013.01); B29C 47/0009 (2013.01); Y02P 70/263 (2015.11);
Abstract
The present invention relates to screw elements with novel, tightly intermeshing, self-cleaning, co-rotating screw profiles for multishaft screw machines with pairs of co-rotating and fully abrading screw shafts, to the use of these screw elements in multishaft screw machines and to a method of generating these screw elements.