Granted Patent
Utility
US 5,032,463 · App. 07/364,034
Very low density polyethylene film from blends
Inventor:
Edwin R. Smith
Patented Case
View Patent ↗
Granted: Jul 16, 1991
Filed: Jun 7, 1989
Inventor
Edwin R. Smith
Assignee (at issue)
Viskase Companies, 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.