Granted Patent
Utility
US 5,279,872 · App. 08/018,572
Multilayer stretch/shrink film
Inventor:
Donald J. Ralph
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Feb 17, 1993
Inventor
Donald J. Ralph
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.