Granted Patent
Utility
US 5,753,326 · App. 08/578,787
Clear film extrusion from an annular die
Inventor:
Maurice W. Blackwelder
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: Dec 26, 1995
Inventor
Maurice W. Blackwelder
Assignee (at issue)
Owens-Illinois Labels Inc.
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.