Granted Patent
Utility
US 6,494,607 · App. 09/849,058
Four wing, non-intermeshing rotors for synchronous drive to provide improved dispersive and distributive mixing in internal batch mixers
Inventors:
Lefteris N. Valsamis, Frank Borzenski, Robert L. Wagner, Walter Rapetski, Hans Baurmeister
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: May 4, 2001
Inventors
Lefteris N. Valsamis
Frank Borzenski
Robert L. Wagner
Walter Rapetski
Hans Baurmeister
Assignee (at issue)
Farrel Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.