Granted Patent
Utility
US 5,407,611 · App. 08/200,328
Process of corona treating a thermoplastic tubular film
Inventors:
Darrel L. Wilhoit, Vincent J. Dudenhoeffer
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Feb 23, 1994
Inventors
Darrel L. Wilhoit
Vincent J. Dudenhoeffer
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.