Granted Patent
Utility
US 5,658,524 · App. 08/434,709
Cellulose article manufacturing method
Inventors:
Norman A. Portnoy, Edward Makoto Kajiwara, Paul Edmund DuCharme, Jr.
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: May 4, 1995
Inventors
Norman A. Portnoy
Edward Makoto Kajiwara
Paul Edmund DuCharme, Jr.
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.