Granted Patent
Utility
US 6,547,999 · App. 09/419,933
Cellulose food casing, cellulose composition and production method therefor
Inventors:
Paul Edmund DuCharme, Jr., Myron D. Nicholson, Norman A. Portnoy
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Oct 18, 1999
Inventors
Paul Edmund DuCharme, Jr.
Myron D. Nicholson
Norman A. Portnoy
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.