Granted Patent
Utility
US 5,466,403 · App. 08/251,573
Apparatus and method for extruding and cooling a polymeric sheet
Inventor:
Frank R. Nissel
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: May 31, 1994
Inventor
Frank R. Nissel
Assignee (at issue)
Welex Incorporated
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.