Granted Patent
Utility
US 5,816,699 · App. 08/874,793
Twin screw extruder barrel with an easily removable seamless insert having a wear and corrosion resistant lining
Inventors:
Larry Keith, Martin A. Ronkin
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Jun 13, 1997
Inventors
Larry Keith
Martin A. Ronkin
Assignee (at issue)
Entek Manufacturing LLC
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.